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{{Short description|Genus of plants in the family Tropaeolaceae}} {{Short description|Genus of plants in the family Tropaeolaceae}}
{{About|the flowering plants of the genus Tropaeolum, commonly called nasturtiums|the genus of watercresses|Nasturtium (genus)}} {{About|the flowering plants of the genus Tropaeolum, commonly called nasturtiums|the genus of watercresses|Nasturtium (plant genus)}}
{{Automatic taxobox {{Automatic taxobox
| image = TropaeolumMajusOrange.jpg | image = TropaeolumMajusOrange.jpg
| image_caption = '']'' | image_caption = '']''
| parent_authority = Juss. ex DC. | parent_authority = ] ex ]
| taxon = Tropaeolum | taxon = Tropaeolum
| authority = ]. | authority = ].
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| synonyms = *''Magallana'' <small>Cav.</small> | synonyms = *''Magallana'' <small>Cav.</small>
*''Trophaeastrum'' <small>Sparre</small> *''Trophaeastrum'' <small>Sparre</small>
| type_species ='']'' | type_species ='']'' L.<ref>''Tropaeolum'' | International Plant Names Index. (n.d.). Retrieved October 29, 2023, from https://www.ipni.org/n/30002592-2</ref>
}} }}
] ]


'''''Tropaeolum''''' {{IPAc-en|t|r|ə|ˈ|p|iː|ə|l|əm|,_|t|r|oʊ|-}},{{refn|{{OxfordDictionaries.com|access-date=2016-01-21|Tropaeolum}}}}<ref>''Sunset Western Garden Book''. 1995. 606–607; {{OED|''Tropaeolum''}}</ref> commonly known as '''nasturtium''' ({{IPAc-en|n|ə|ˈ|s|t|ɜːr|ʃ|əm|,_|n|æ|-}};{{refn|{{OxfordDictionaries.com|access-date=2016-01-21|nasturtium}}}}{{refn|{{MerriamWebsterDictionary|access-date=2016-01-21|nasturtium}}}}<ref>{{OED|Nasturtium}}</ref> literally "nose-twister" or "nose-tweaker"), is a genus of roughly 80 species of ] and ] ] ]s. It was ] by ] in his book '']'',<ref>{{cite book |last=Linnæus |first=Carl |date=1753-05-01 |title=Species Plantarum : exhibentes plantas rite cognitas ad genera relatas, cum diferentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas |trans-title=The Species of Plants |language=la |volume=1 |location=Stockholm, Sweden |publisher=Laurentius Salvius |page=345}}</ref> and is the only genus in the ] '''Tropaeolaceae'''. The nasturtiums received their common name because they produce an oil similar to that of ] (''Nasturtium officinale''). '''''Tropaeolum''''' {{IPAc-en|t|r|ə|ˈ|p|iː|ə|l|əm|,_|t|r|oʊ|-}},{{refn|{{Cite dictionary |url=http://www.lexico.com/definition/Tropaeolum |archive-url=https://web.archive.org/web/20200322182240/https://www.lexico.com/definition/tropaeolum |url-status=dead |archive-date=2020-03-22 |title=Tropaeolum |dictionary=] UK English Dictionary |publisher=]}} }}<ref>''Sunset Western Garden Book''. 1995. 606–607; {{OED|''Tropaeolum''}}</ref> commonly known as '''nasturtium''' ({{IPAc-en|n|ə|ˈ|s|t|ɜːr|ʃ|əm|,_|n|æ|-}};{{refn|{{Cite dictionary |url=http://www.lexico.com/definition/nasturtium |archive-url=https://web.archive.org/web/20200322182209/https://www.lexico.com/definition/nasturtium |url-status=dead |archive-date=2020-03-22 |title=nasturtium |dictionary=] UK English Dictionary |publisher=]}} }}{{refn|{{MerriamWebsterDictionary|access-date=2016-01-21|nasturtium}}}}<ref>{{OED|Nasturtium}}</ref> literally "nose-twister" or "nose-tweaker"), is a genus of roughly 80 species of ] and ] ] ]s. It was ] by ] in his book '']'',<ref>{{cite book |last=Linnæus |first=Carl |date=1753-05-01 |title=Species Plantarum : exhibentes plantas rite cognitas ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas |trans-title=The Species of Plants |language=la |volume=1 |location=Stockholm, Sweden |publisher=Laurentius Salvius |page=345}}</ref> and is the only genus in the ] '''Tropaeolaceae'''. The nasturtiums received their common name because they produce an oil similar to that of ] (''Nasturtium officinale'').


The genus ''Tropaeolum'', ] to South and Central America, includes several very popular garden plants, the most common being '']'', '']'' and '']''. One of the ] species is '']'' from ], the perennial roots of which can survive the winter underground at altitudes of 3,300&nbsp;metres (10,000&nbsp;ft). The genus ''Tropaeolum'', ] to South and Central America, includes several very popular garden plants, the most common being '']'', '']'' and '']''. One of the ] species is '']'' from ], the perennial roots of which can survive the winter underground at elevations of {{convert|3,300|m|ft|sigfig=2}}.


Plants in this genus have showy, often intensely bright flowers and rounded, ] (]-shaped) leaves with the ] in the centre. The flowers are bisexual and ], with five petals, a ], and a funnel-shaped nectar spur at the back, formed by modification of one of the five sepals.<ref name=Heywood>{{cite book |title=Flowering plant families of the world |last1=Heywood |first1=V.H. |last2=Brummitt |first2=R.K. |last3=Culham |first3=A. |last4=Seberg |first4=O. |year=2007 |publisher=Firefly Books |isbn=978-1554072064 |pages=324}}</ref> Plants in this genus have showy, often intensely bright flowers and rounded, ] (]-shaped) leaves with the ] in the centre. The flowers are bisexual and ], with five petals, a ], and a funnel-shaped nectar spur at the back, formed by modification of one of the five sepals.<ref name=Heywood>{{cite book |title=Flowering plant families of the world |last1=Heywood |first1=V.H. |last2=Brummitt |first2=R.K. |last3=Culham |first3=A. |last4=Seberg |first4=O. |year=2007 |publisher=Firefly Books |isbn=978-1554072064 |pages=324}}</ref>


== History == == History ==
''Tropaeolum'' was first imported into Spain by the Spanish botanist ], who described it in his '']'' of 1569, translated into English as ''Ioyfull newes out of the newe founde worlde'' by ].<ref>{{Cite book|last=Frampton|first=John|url=https://fsu.digital.flvc.org/islandora/object/fsu%3A213358#page/Page+5/mode/2up|title=Joyfull newes of the newfound world|year=1580}}</ref> The English herbalist ] reports having received seeds of the plant from Europe in his 1597 book ''Herball, or Generall Historie of Plantes''.<ref name=Woodward>{{cite book |title=Leaves from Gerard's Herball arranged for garden lovers |url=https://archive.org/details/leavesfromgerard00gera |url-access=registration |last=Woodward |first=M. |year=1969 |publisher=Dover publications Inc., New York |pages= }}</ref> ''Tropaeolum majus'' was named by the Swedish botanist ], who chose the genus name because the plant reminded him of an ancient custom: After victory in battle, the Romans erected a trophy pole (or ''tropaeum'', from the Greek ], source of English "]") on which the vanquished foe's armour and weapons were hung. The plant's round leaves reminded Linnaeus of shields, and its flowers of blood-stained helmets.<ref name=World>{{cite book |title=Flowers of the World |last=Perry |first=Frances |year=1972 |publisher=The Hamlyn Publishing Group |isbn=978-0600355922 |pages=298–300 }}</ref> ''Tropaeolum'' was introduced into Spain by the Spanish botanist ], who described it in his '']'' of 1569, translated into English as ''Ioyfull newes out of the newe founde worlde'' by ].<ref>{{Cite book|last=Frampton|first=John|url=https://fsu.digital.flvc.org/islandora/object/fsu%3A213358#page/Page+5/mode/2up|title=Joyfull newes of the newfound world|year=1580}}</ref> The English herbalist ] reports having received seeds of the plant from Europe in his 1597 book ''Herball, or Generall Historie of Plantes''.<ref name=Woodward>{{cite book |title=Leaves from Gerard's Herball arranged for garden lovers |url=https://archive.org/details/leavesfromgerard00gera |url-access=registration |last=Woodward |first=M. |year=1969 |publisher=Dover publications Inc., New York |pages= |isbn=9780486223438 }}</ref> ''Tropaeolum majus'' was named by the Swedish botanist ], who chose the genus name because the plant reminded him of an ancient custom: After victory in battle, the Romans erected a trophy pole (or ''tropaeum'', from the Greek ], source of English "]") on which the vanquished foe's armour and weapons were hung. The plant's round leaves reminded Linnaeus of shields and its flowers of blood-stained helmets.<ref name=World>{{cite book |title=Flowers of the World |last=Perry |first=Frances |year=1972 |publisher=The Hamlyn Publishing Group |isbn=978-0600355922 |pages=298–300 }}</ref>


Nasturtiums were once commonly known as "Indian cresses" because they were introduced from the Americas, known popularly then as the Indies, and used like cress as salad ingredients. In his herbal, John Gerard compared the flowers of the "Indian Cress" to those of the ] (''Consolida regalis'') of the ].<ref name=World/> He wrote: "Unto the backe part (of the flower) doth hange a taile or spurre, such as hath the Larkes heele, called in Latine ''Consolida regalis''."<ref name=Woodward/> Nasturtiums were once commonly called "Indian cresses" because they were introduced from the Americas, known popularly then as the Indies, and used like cress as salad ingredients. In his herbal, John Gerard compared the flowers of the "Indian Cress" to those of the ] (''Consolida regalis'') of the ].<ref name=World/> He wrote: "Unto the backe part (of the flower) doth hange a taile or spurre, such as hath the Larkes heele, called in Latine ''Consolida regalis''."<ref name=Woodward/>


] commented that an alternative anglicization of "nasturtium" was "nasturtian".<ref>{{cite web |url=http://tolkiengateway.net/Letter_148 |title=Letter 148 |author=Tolkien, J. R. R. |date=1954-08-07 |work=Tolkien Gateway |access-date=2014-06-04}}</ref> ] commented that an alternative anglicization of "nasturtium" was "nasturtian".<ref>{{ME-ref|Letters|Letter 148 of 7 August 1954}}</ref>


== Description == == Description ==

''Tropaeolum'' is a genus of ]ous annual or perennial plants, often with somewhat succulent stems and sometimes tuberous roots. The alternate leaves are hairless, ], and entire or palmately lobed. The petioles or leaf stalks are long and in many species are able to twine around other stems to provide support. The flowers are bisexual and showy, set singly on long stalks in the axils of the leaves. They have five ], the uppermost of which is elongated into a nectar spur. The five ] are clawed, with the lower three unlike the upper two. The eight ] are in two whorls of unequal length and the superior ovary has three segments and three ] on a single ]. The fruit is naked and nut-like, with three single seed segments.<ref>{{cite book |title=The Concise Oxford Dictionary of Botany |editor-last=Allaby |editor-first=Michael |year=1992 |publisher=Oxford University Press |location=Oxford |isbn=978-0198661634 |page= |url=https://archive.org/details/conciseoxforddic00mich/page/418 |url-access=registration }}</ref><ref>{{cite web |url=http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?Tropaeolum+majus |title=Tropaeolaceae: Nasturtium Family |author=McClintock, Elizabeth |publisher=Jepson Flora Project |access-date=2012-06-20}}</ref> ''Tropaeolum'' is a genus of ]ous annual or perennial plants, often with somewhat succulent stems and sometimes tuberous roots. The alternate leaves are hairless, ], and entirely or palmately lobed. The petioles or leaf stalks are long and, in many species, can twine around other stems to provide support. The flowers are bisexual and showy, set singly on long stalks in the axils of the leaves. They have five ], the uppermost of which is elongated into a nectar spur. The five ] are clawed, with the lower three unlike the upper two. The eight ] are in two whorls of unequal length, and the superior ovary has three segments and three ] on a single ]. The fruit is naked and nut-like, with three single seed segments.<ref>{{cite book |title=The Concise Oxford Dictionary of Botany |editor-last=Allaby |editor-first=Michael |year=1992 |publisher=Oxford University Press |location=Oxford |isbn=978-0198661634 |page= |url=https://archive.org/details/conciseoxforddic00mich/page/418 |url-access=registration }}</ref><ref>{{cite web |url=http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?Tropaeolum+majus |title=Tropaeolaceae: Nasturtium Family |author=McClintock, Elizabeth |publisher=Jepson Flora Project |access-date=2012-06-20}}</ref>
] ]


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]'']] ]'']]
]'']] ]'']]
The most common flower in cultivation is a ] of ''T. majus'', ''T. minus,'' and ''T. peltophorum'', and is commonly known as the nasturtium (and occasionally anglicized as nasturtian). It is mostly grown from seed as a half-hardy annual and both single and double varieties are available. It comes in a range of forms and colours including cream, yellow, orange and red, solid in colour or striped and often with a dark blotch at the base of the petals. It is vigorous and easily grown and does well in sun. It thrives in poor soil and dry conditions, whereas in rich soil it tends to produce much leafy growth and few flowers. Some varieties adopt a bush form while others scramble over and through other plants and are useful for planting in awkward spots or for covering fences and ]es.<ref name=Genus>{{cite web |url=http://homepage.ntlworld.com/john.mcfarlane/The%20genus%20Tropaeolum.html |title=The Genus ''Tropaeolum'' |author=McFarlane, J. S. |date=2001-12-29 |access-date=2012-06-05 |url-status=dead |archive-url=https://web.archive.org/web/20120702232809/http://homepage.ntlworld.com/john.mcfarlane/The%20genus%20Tropaeolum.html |archive-date=2012-07-02 }}</ref> The most common flower in cultivation is a ] of ''T. majus'', ''T. minus,'' and ''T. peltophorum''. It is commonly known as the nasturtium (and occasionally anglicized as nasturtian). It is mostly grown from seed as a half-hardy annual, and both single and double varieties are available. It comes in various forms and colours, including cream, yellow, orange and red, solid in colour or striped and often with a dark blotch at the base of the petals. It is vigorous and easily grown and does well in sun. It thrives in poor soil and dry conditions, whereas rich soil produces much leafy growth and few flowers. Some varieties adopt a bush form while others scramble over and through other plants and are useful for planting in awkward spots or for covering fences and ]es.<ref name=Genus>{{cite web |url=http://homepage.ntlworld.com/john.mcfarlane/The%20genus%20Tropaeolum.html |title=The Genus ''Tropaeolum'' |author=McFarlane, J. S. |date=2001-12-29 |access-date=2012-06-05 |url-status=dead |archive-url=https://web.archive.org/web/20120702232809/http://homepage.ntlworld.com/john.mcfarlane/The%20genus%20Tropaeolum.html |archive-date=2012-07-02 }}</ref>


The following ]s have gained the ]'s ]: The following ]s have gained the ]'s ]:
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* 'Whirlybird Series'<ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=4219 |title=''Tropaeolum'' Whirlybird Series AGM |publisher=Royal Horticultural Society |access-date=2012-09-08}}</ref> * 'Whirlybird Series'<ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=4219 |title=''Tropaeolum'' Whirlybird Series AGM |publisher=Royal Horticultural Society |access-date=2012-09-08}}</ref>


The ] (''Tropaeolum azureum'') is a tender species from Chile which has violet-blue flowers with white eyes that can be as much as {{convert|4|cm|1|abbr=on}} across.<ref name=PBS/> The ] (''Tropaeolum azureum'') is a tender species from Chile which has violet-blue flowers with white eyes that can be as much as {{convert|4|cm|in|frac=2|abbr=on}} across.<ref name=PBS/>


'']'' has {{convert|2.5|cm|0|abbr=on}} yellow flowers with purplish markings on wiry, climbing stems. It is a half hardy perennial from Chile and may remain ] for several years before being sparked into growth by some unknown trigger factor.<ref name=PBS/> '']'' has {{convert|2.5|cm|0|abbr=on}} yellow flowers with purplish markings on wiry, climbing stems. It is a half-hardy perennial from Chile and may remain ] for several years before being sparked into growth by some unknown trigger factor.<ref name=PBS/>


'']'' is a tuberous-rooted species from Chile. There are two subspecies, ''T.&nbsp;h.&nbsp;austropurpureum'' which has violet-purple flowers and ''T.&nbsp;h.&nbsp;pilosum'' with yellow flowers.<ref name=PBS/> '']'' is a tuberous-rooted species from Chile. There are two subspecies, ''T.&nbsp;h.&nbsp;austropurpureum'' which has violet-purple flowers and ''T.&nbsp;h.&nbsp;pilosum'' with yellow flowers.<ref name=PBS/>
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The ] (''Tropaeolum peregrinum'') is a trailing and climbing half-hardy annual species with wiry stalks and palmately lobed leaves. The pale yellow, fringed flowers are borne on long stalks. It originated from ] but may first have been cultivated in the ] before being introduced into Western Europe.<ref name=World/> The ] (''Tropaeolum peregrinum'') is a trailing and climbing half-hardy annual species with wiry stalks and palmately lobed leaves. The pale yellow, fringed flowers are borne on long stalks. It originated from ] but may first have been cultivated in the ] before being introduced into Western Europe.<ref name=World/>


] (''Tropaeolum polyphyllum'') is a prostrate plant originating from Argentina and Chile. It has silvery, deeply lobed leaves and a profusion of small, bright yellow flowers on long trailing stalks. After flowering, the plant dies back. It is a perennial with underground ]s which send up new shoots at intervals. In a suitable sunny location with well drained soil, it will survive for several years.<ref name=World/> It is a very hardy species; the tubers can grow at depths of {{convert|60|cm|0|abbr=on}} enabling the plant to survive at altitudes of as much as 3,300&nbsp;metres (10,000&nbsp;ft) in the Andes.<ref>{{cite web |url=http://rareplants.co.uk/product.asp?P_ID=1007 |title=''Tropaeolum polyphyllum'' |publisher=Rare Plants |access-date=2014-06-04}}</ref> ] (''Tropaeolum polyphyllum'') is a prostrate plant originating from Argentina and Chile. It has silvery, deeply lobed leaves and a profusion of small, bright yellow flowers on long trailing stalks. After flowering, the plant dies back. It is a perennial with underground ]s which send up new shoots at intervals. It will survive for several years in a suitable sunny location with well-drained soil.<ref name=World/> It is a very hardy species; the tubers can grow at depths of {{convert|60|cm|0|abbr=on}} enabling the plant to survive at altitudes of as much as 3,300&nbsp;metres (10,000&nbsp;ft) in the Andes.<ref>{{cite web |url=http://rareplants.co.uk/product.asp?P_ID=1007 |title=''Tropaeolum polyphyllum'' |publisher=Rare Plants |access-date=2014-06-04}}</ref>


The ] (''Tropaeolum speciosum'') is well adapted to cool, moist climates and famously does well in Scotland. It sends up shoots which thread their way through hedges and shrubs and which, when they emerge into the light, bear brilliant red flowers among small, five or six-lobed leaves. It is difficult to establish but is an attractive garden plant when it thrives.<ref name=World/> This plant has gained the Royal Horticultural Society's Award of Garden Merit.<ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=1954 |title=''Tropaeolum speciosum'' AGM |publisher=Royal Horticultural Society |access-date=2012-09-08}}</ref> The ] (''Tropaeolum speciosum'') is well adapted to cool, moist climates and famously does well in Scotland. It sends up shoots that thread their way through hedges and shrubs and, when they emerge into the light, bear brilliant red flowers among small, five or six-lobed leaves. It is difficult to establish but is an attractive garden plant when it thrives.<ref name=World/> This plant has gained the Royal Horticultural Society's Award of Garden Merit.<ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=1954 |title=''Tropaeolum speciosum'' AGM |publisher=Royal Horticultural Society |access-date=2012-09-08}}</ref>


] (''Tropaeolum tricolor'') is another tuberous, climbing species grown for its attractive red, purple and yellow tubular flowers. It comes from Chile and ] and is a reliable winter-growing species.<ref name=PBS>{{cite web |url=http://www.pacificbulbsociety.org/pbswiki/index.php/Tropaeolum |title=Tropaeolum: ''Tropaeolum tricolor'' |publisher=Pacific Bulb Society |access-date=2012-06-23}}</ref> ] (''Tropaeolum tricolor'') is another tuberous, climbing species grown for its attractive red, purple and yellow tubular flowers. It comes from Chile and ] and is a reliable winter-growing species.<ref name=PBS>{{cite web |url=http://www.pacificbulbsociety.org/pbswiki/index.php/Tropaeolum |title=Tropaeolum: ''Tropaeolum tricolor'' |publisher=Pacific Bulb Society |access-date=2012-06-23}}</ref>


] (''Tropaeolum tuberosum'') is a perennial climbing plant from the ] grown for its tuberous roots. It has been cultivated since ancient times and depictions of it are found at archaeological sites pre-dating the ]s. It has leaves with five to seven lobes and small, long-spurred, red and yellow flowers. The tubers have an unpleasant smell when raw which disappears on cooking. It is frost-hardy and produces crops of 30 tons per hectare at a height of {{convert|3000|m}} above sea level.<ref>{{cite web |url=http://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1434&context=ebl |title=Mashua Ethnobotanical Leaflet |publisher=Southern Illinois University |access-date=2012-06-21}}</ref> The cultivar ''T. tuberosum lineamaculatum'' 'Ken Aslet' has gained the Royal Horticultural Society's Award of Garden Merit. ] (''Tropaeolum tuberosum'') is a perennial climbing plant from the ] grown for its tuberous roots. It has been cultivated since ancient times, and depictions of it are found at archaeological sites pre-dating the ]s. It has leaves with five to seven lobes and small, long-spurred, red and yellow flowers. The tubers have an unpleasant smell when raw, which disappears on cooking. It is frost-hardy and produces crops of 30 tonnes per hectare at an elevation of {{convert|3000|m}} above sea level.<ref>{{cite web |url=http://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1434&context=ebl |title=Mashua Ethnobotanical Leaflet |publisher=Southern Illinois University |access-date=2012-06-21}}</ref> The cultivar ''T. tuberosum lineamaculatum'' 'Ken Aslet' has gained the Royal Horticultural Society's Award of Garden Merit.
<ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=1955 |title=''Tropaeolum tuberosum'' var. ''lineamaculatum'' 'Ken Aslet' AGM |publisher=Royal Horticultural Society |access-date=2012-09-08}}</ref> <ref>{{cite web |url=http://apps.rhs.org.uk/plantselector/plant?plantid=1955 |title=''Tropaeolum tuberosum'' var. ''lineamaculatum'' 'Ken Aslet' AGM |publisher=Royal Horticultural Society |access-date=2012-09-08 |archive-date=2013-06-15 |archive-url=https://web.archive.org/web/20130615062326/http://apps.rhs.org.uk/plantselector/plant?plantid=1955 |url-status=dead }}</ref>


Species that originated from the coastal areas and from the lower foothills make most of their growth in winter whereas the true alpine species are summer growers. Tuberous ''Tropaeolum'' species are well known for occasionally remaining ] for one or more years. The species with underground rhizomes and tubers can be propagated from these while other species are best raised from seed. Fresh seed is favoured by many growers but dried seed is also often successful. Seed from the winter growing species should be sown in the autumn while the summer growing species are best sown in the spring in well-drained compost and covered with {{convert|1|to|2|cm|1|abbr=on}} of grit or sand. The containers should be kept at below {{convert|4|°C}} until the seedlings appear in about a month, as too high a temperature inhibits ].<ref>{{cite web |url=http://www.pacificbulbsociety.org/pbswiki/index.php/Tropaeolum |title=''Tropaeolum'' |publisher=Pacific Bulb Society |access-date=2012-06-23}}</ref> Species originating from the coastal areas and lower foothills make most of their growth in winter, whereas the true alpine species are summer growers. Tuberous ''Tropaeolum'' species are well known for occasionally remaining ] for one or more years. The species with underground rhizomes and tubers can be propagated from these, while other species are best raised from seed. Many growers favour fresh seed, but dried seed is also often successful. Seed from the winter growing species should be sown in the autumn, while the summer growing species are best sown in the spring in well-drained compost and covered with {{convert|1|to|2|cm|in|frac=4|abbr=on}} of grit or sand. The containers should be kept at below {{convert|4|°C}} until the seedlings appear in about a month, as too high a temperature inhibits ].<ref>{{cite web |url=http://www.pacificbulbsociety.org/pbswiki/index.php/Tropaeolum |title=''Tropaeolum'' |publisher=Pacific Bulb Society |access-date=2012-06-23}}</ref>


== Uses == == Uses ==
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=== Culinary === === Culinary ===
] ]
All parts of '']'' are edible. The flower has most often been consumed, making for an especially ornamental salad ingredient; it has a slightly peppery taste reminiscent of ], and is also used in ]. The flowers contain about 130&nbsp;mg ] per {{convert|100|g}},<ref name=PFAF>{{cite web |url=http://www.pfaf.org/user/Plant.aspx?LatinName=Tropaeolum+minus |title=''Tropaeolum minus'' |publisher=Plants For A Future |access-date=2012-06-05}}</ref> about the same amount as is contained in ].<ref>{{Cite journal |author=United States Department of Agriculture Research Service |title=USDA National Nutrient Database for Standard Reference, Release 23 |year=2010 |access-date=2011 |publisher=Nutrient Data Laboratory |url=http://www.ars.usda.gov/ba/bhnrc/ndl }}</ref> Moreover, they contain up to 45&nbsp;mg of ] per 100 g,<ref>{{Cite journal |author1=Niizu, P.Y. |author2=Rodriguez-Amaya, Delia B. |name-list-style=amp All parts of '']'' are edible. The flower has most often been consumed, making for an especially ornamental salad ingredient; it has a slightly peppery taste reminiscent of ] and is also used in ]. The flowers contain about 130&nbsp;mg ] per {{convert|100|g|oz|frac=2}},<ref name=PFAF>{{cite web |url=http://www.pfaf.org/user/Plant.aspx?LatinName=Tropaeolum+minus |title=''Tropaeolum minus'' |publisher=Plants For A Future |access-date=2012-06-05}}</ref> about the same amount as is contained in ].<ref>{{Cite web |title=Parsley, fresh (SR Legacy, 170416) |website=FoodData Central - ] - ] |url=https://fdc.nal.usda.gov/fdc-app.html#/food-details/170416/nutrients |access-date=14 October 2024 }}</ref> Moreover, they contain up to 45&nbsp;mg of ] per 100 g,<ref>{{Cite journal |author1=Niizu, P.Y. |author2=Rodriguez-Amaya, Delia B. |name-list-style=amp
|title = Flowers and leaves of ''Tropaeolum majus'' L. as rich sources of lutein |title = Flowers and leaves of ''Tropaeolum majus'' L. as rich sources of lutein
|journal = Journal of Food Science |journal = Journal of Food Science
Line 82: Line 83:


=== Herbal medicine === === Herbal medicine ===
''T. majus'' has been used in herbal medicine for respiratory and ]s.<ref> (Original title: Portraet einer Heilpflanze. ''Tropaeolum majus'' L. - die Kapuzinerkresse. Merkurstab 1995; 48:357-62. English by A. R. Meuss, FIL, MTA.)</ref> ''T. majus'' has been used in herbal medicine for respiratory and ]s.<ref> (Original title: Portraet einer Heilpflanze. ''Tropaeolum majus'' L. - die Kapuzinerkresse. Merkurstab 1995; 48:357-62. English by A. R. Meuss, FIL, MTA.)</ref>


In Germany, licensed physicians are allowed to prescribe the herbal antibiotic, Angocin Anti-Infekt N, made from only nasturtium and horseradish root.<ref name="Angocin Anti-Infekt N">{{cite journal | pmid= 16618018 In Germany, licensed physicians can prescribe the herbal antibiotic Angocin Anti-Infekt N, made from only nasturtium and ] root.<ref name="Angocin Anti-Infekt N">{{cite journal | pmid= 16618018
| year= 2006 | year= 2006
| last1= Goos | last1= Goos
Line 98: Line 99:
| first3= B | first3= B
| doi= 10.1055/s-0031-1296717 | doi= 10.1055/s-0031-1296717
| s2cid= 45531401
}}</ref> }}</ref>


=== Companion planting and biological pest control === === Companion planting and biological pest control ===
Nasturtiums are used as ]s for ], repelling some pests, acting as a ] for others and attracting predatory insects.<ref name=hum>Hummel, K. Coles County Yard and Garden. University of Illinois Extension.</ref><ref name=cornell>{{Cite web|title=Companion Planting|url=http://cceniagaracounty.org/wp-content/uploads/2014/02/companion-planting-info.pdf|work=Cornell Cooperative Extension|date=May 1999|location=Chemung County|archive-url=https://web.archive.org/web/20140529193140/http://cceniagaracounty.org/wp-content/uploads/2014/02/companion-planting-info.pdf|archive-date=May 29, 2014|url-status=dead}}</ref> Nasturtiums are used as ]s for ], repelling some pests, acting as a ] for others and attracting predatory insects.<ref name=hum>Hummel, K. {{Webarchive|url=https://web.archive.org/web/20150214051219/http://web.extension.illinois.edu/ccdms/yg/120811.html |date=2015-02-14 }} Coles County Yard and Garden. University of Illinois Extension.</ref><ref name=cornell>{{Cite web|title=Companion Planting|url=http://cceniagaracounty.org/wp-content/uploads/2014/02/companion-planting-info.pdf|work=Cornell Cooperative Extension|date=May 1999|location=Chemung County|archive-url=https://web.archive.org/web/20140529193140/http://cceniagaracounty.org/wp-content/uploads/2014/02/companion-planting-info.pdf|archive-date=May 29, 2014|url-status=dead}}</ref> While companion planting is a widespread notion and often adopted by home gardeners, there is little but anecdotal evidence to support these claims.<ref>{{Cite web|author=Linda Chalker-Scott, Ph.D.|date=February 20, 2008|title=The Myth of Companion Plantings - "Certain species will thrive, lean on, nestle with, and support each other in groupings"|website=]|url=https://s3.wp.wsu.edu/uploads/sites/403/2015/03/companion-plantings.pdf}}</ref>


== Taxonomy == == Taxonomy ==
Line 107: Line 109:


== Species == == Species ==
"The Plant List", a collaboration between the ] and the ] includes the following accepted names of ''Tropaeolum'' species names. Some that are under review, are here marked "U".<ref>{{cite web |url=http://www.theplantlist.org/tpl/search?q=Tropaeolum |title=''Tropaeolum'' |year=2010 |work=The Plant List |access-date=2012-06-23}}</ref> "The Plant List", a collaboration between the ] and the ], includes the following accepted names of ''Tropaeolum'' species names. Some that are under review are here marked "U".<ref>{{cite web |url=http://www.theplantlist.org/tpl/search?q=Tropaeolum |title=''Tropaeolum'' |year=2010 |work=The Plant List |access-date=2012-06-23}}</ref>
{{Columns-list|colwidth=20em| {{Columns-list|colwidth=20em|
* '']'' * '']''

Latest revision as of 03:55, 15 October 2024

Genus of plants in the family Tropaeolaceae This article is about the flowering plants of the genus Tropaeolum, commonly called nasturtiums. For the genus of watercresses, see Nasturtium (plant genus).

Tropaeolum
Tropaeolum majus
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Tropaeolaceae
Juss. ex DC.
Genus: Tropaeolum
L.
Type species
Tropaeolum majus L.
Species

About 80 species, see text.

Synonyms
  • Magallana Cav.
  • Trophaeastrum Sparre
Tropaeolum majus

Tropaeolum /trəˈpiːələm, troʊ-/, commonly known as nasturtium (/nəˈstɜːrʃəm, næ-/; literally "nose-twister" or "nose-tweaker"), is a genus of roughly 80 species of annual and perennial herbaceous flowering plants. It was named by Carl Linnaeus in his book Species Plantarum, and is the only genus in the family Tropaeolaceae. The nasturtiums received their common name because they produce an oil similar to that of watercress (Nasturtium officinale).

The genus Tropaeolum, native to South and Central America, includes several very popular garden plants, the most common being T. majus, T. peregrinum and T. speciosum. One of the hardiest species is T. polyphyllum from Chile, the perennial roots of which can survive the winter underground at elevations of 3,300 metres (11,000 ft).

Plants in this genus have showy, often intensely bright flowers and rounded, peltate (shield-shaped) leaves with the petiole in the centre. The flowers are bisexual and zygomorphic, with five petals, a superior three-carpelled ovary, and a funnel-shaped nectar spur at the back, formed by modification of one of the five sepals.

History

Tropaeolum was introduced into Spain by the Spanish botanist Nicolás Monardes, who described it in his Historia medicinal de las cosas que se traen de nuestras Indias Occidentales of 1569, translated into English as Ioyfull newes out of the newe founde worlde by John Frampton. The English herbalist John Gerard reports having received seeds of the plant from Europe in his 1597 book Herball, or Generall Historie of Plantes. Tropaeolum majus was named by the Swedish botanist Carl Linnaeus, who chose the genus name because the plant reminded him of an ancient custom: After victory in battle, the Romans erected a trophy pole (or tropaeum, from the Greek tropaion, source of English "trophy") on which the vanquished foe's armour and weapons were hung. The plant's round leaves reminded Linnaeus of shields and its flowers of blood-stained helmets.

Nasturtiums were once commonly called "Indian cresses" because they were introduced from the Americas, known popularly then as the Indies, and used like cress as salad ingredients. In his herbal, John Gerard compared the flowers of the "Indian Cress" to those of the forking larkspur (Consolida regalis) of the buttercup family. He wrote: "Unto the backe part (of the flower) doth hange a taile or spurre, such as hath the Larkes heele, called in Latine Consolida regalis."

J. R. R. Tolkien commented that an alternative anglicization of "nasturtium" was "nasturtian".

Description

Tropaeolum is a genus of dicotyledonous annual or perennial plants, often with somewhat succulent stems and sometimes tuberous roots. The alternate leaves are hairless, peltate, and entirely or palmately lobed. The petioles or leaf stalks are long and, in many species, can twine around other stems to provide support. The flowers are bisexual and showy, set singly on long stalks in the axils of the leaves. They have five sepals, the uppermost of which is elongated into a nectar spur. The five petals are clawed, with the lower three unlike the upper two. The eight stamens are in two whorls of unequal length, and the superior ovary has three segments and three stigmas on a single style. The fruit is naked and nut-like, with three single seed segments.

Nasturtium -- Tropaeolum

Species in cultivation

Flowering yellow and red Tropaeolum majus (garden nasturtium)
Tropaeolum peregrinum
Tropaeolum polyphyllum
Tropaeolum tricolor
Tropaeolum tuberosum

The most common flower in cultivation is a hybrid of T. majus, T. minus, and T. peltophorum. It is commonly known as the nasturtium (and occasionally anglicized as nasturtian). It is mostly grown from seed as a half-hardy annual, and both single and double varieties are available. It comes in various forms and colours, including cream, yellow, orange and red, solid in colour or striped and often with a dark blotch at the base of the petals. It is vigorous and easily grown and does well in sun. It thrives in poor soil and dry conditions, whereas rich soil produces much leafy growth and few flowers. Some varieties adopt a bush form while others scramble over and through other plants and are useful for planting in awkward spots or for covering fences and trellises.

The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:

  • 'Alaska Series'
  • 'Hermine Grashoff'
  • 'Whirlybird Series'

The blue nasturtium (Tropaeolum azureum) is a tender species from Chile which has violet-blue flowers with white eyes that can be as much as 4 cm (1+1⁄2 in) across.

Tropaeolum brachyceras has 2.5 cm (1 in) yellow flowers with purplish markings on wiry, climbing stems. It is a half-hardy perennial from Chile and may remain dormant for several years before being sparked into growth by some unknown trigger factor.

Tropaeolum hookerianum is a tuberous-rooted species from Chile. There are two subspecies, T. h. austropurpureum which has violet-purple flowers and T. h. pilosum with yellow flowers.

The Canary creeper (Tropaeolum peregrinum) is a trailing and climbing half-hardy annual species with wiry stalks and palmately lobed leaves. The pale yellow, fringed flowers are borne on long stalks. It originated from Peru but may first have been cultivated in the Canary Islands before being introduced into Western Europe.

Wreath nasturtium (Tropaeolum polyphyllum) is a prostrate plant originating from Argentina and Chile. It has silvery, deeply lobed leaves and a profusion of small, bright yellow flowers on long trailing stalks. After flowering, the plant dies back. It is a perennial with underground rhizomes which send up new shoots at intervals. It will survive for several years in a suitable sunny location with well-drained soil. It is a very hardy species; the tubers can grow at depths of 60 cm (24 in) enabling the plant to survive at altitudes of as much as 3,300 metres (10,000 ft) in the Andes.

The flame flower (Tropaeolum speciosum) is well adapted to cool, moist climates and famously does well in Scotland. It sends up shoots that thread their way through hedges and shrubs and, when they emerge into the light, bear brilliant red flowers among small, five or six-lobed leaves. It is difficult to establish but is an attractive garden plant when it thrives. This plant has gained the Royal Horticultural Society's Award of Garden Merit.

Three-coloured Indian cress (Tropaeolum tricolor) is another tuberous, climbing species grown for its attractive red, purple and yellow tubular flowers. It comes from Chile and Bolivia and is a reliable winter-growing species.

Mashua (Tropaeolum tuberosum) is a perennial climbing plant from the Andes grown for its tuberous roots. It has been cultivated since ancient times, and depictions of it are found at archaeological sites pre-dating the Incas. It has leaves with five to seven lobes and small, long-spurred, red and yellow flowers. The tubers have an unpleasant smell when raw, which disappears on cooking. It is frost-hardy and produces crops of 30 tonnes per hectare at an elevation of 3,000 metres (9,800 ft) above sea level. The cultivar T. tuberosum lineamaculatum 'Ken Aslet' has gained the Royal Horticultural Society's Award of Garden Merit.

Species originating from the coastal areas and lower foothills make most of their growth in winter, whereas the true alpine species are summer growers. Tuberous Tropaeolum species are well known for occasionally remaining dormant for one or more years. The species with underground rhizomes and tubers can be propagated from these, while other species are best raised from seed. Many growers favour fresh seed, but dried seed is also often successful. Seed from the winter growing species should be sown in the autumn, while the summer growing species are best sown in the spring in well-drained compost and covered with 1 to 2 cm (1⁄2 to 3⁄4 in) of grit or sand. The containers should be kept at below 4 °C (39 °F) until the seedlings appear in about a month, as too high a temperature inhibits germination.

Uses

Culinary

Salad with flowers and leaves

All parts of Tropaeolum majus are edible. The flower has most often been consumed, making for an especially ornamental salad ingredient; it has a slightly peppery taste reminiscent of watercress and is also used in stir fry. The flowers contain about 130 mg vitamin C per 100 grams (3+1⁄2 oz), about the same amount as is contained in parsley. Moreover, they contain up to 45 mg of lutein per 100 g, which is the highest amount found in any edible plant. The unripe seed pods can be harvested and dropped into spiced vinegar to produce a condiment and garnish, sometimes used in place of capers.

Mashua (T. tuberosum) produces an edible underground tuber that is a major food source in parts of the Andes.

Herbal medicine

T. majus has been used in herbal medicine for respiratory and urinary tract infections.

In Germany, licensed physicians can prescribe the herbal antibiotic Angocin Anti-Infekt N, made from only nasturtium and horseradish root.

Companion planting and biological pest control

Nasturtiums are used as companion plants for biological pest control, repelling some pests, acting as a trap crop for others and attracting predatory insects. While companion planting is a widespread notion and often adopted by home gardeners, there is little but anecdotal evidence to support these claims.

Taxonomy

Tropaeolum was previously placed in the family Tropaeolaceae along with two other genera, Magallana Cav. and Trophaeastrum. The monotypic genus Magallana was characterised by having winged fruit, and the two species of Trophaeastrum lacked spurs. The genus Tropaeolum was diagnosed only by the absence of the characteristics of the other two genera. A molecular study undertaken in 2000 found Tropaeolum to be paraphyletic when the other two genera are segregated, so Magallana and Trophaeastrum were reduced to synonyms of Tropaeolum. Tropaeolaceae was thus rendered monogeneric, a family of only one genus.

Species

"The Plant List", a collaboration between the Missouri Botanical Garden and the Royal Botanic Gardens, Kew, includes the following accepted names of Tropaeolum species names. Some that are under review are here marked "U".

References

  1. Tropaeolum | International Plant Names Index. (n.d.). Retrieved October 29, 2023, from https://www.ipni.org/n/30002592-2
  2. "Tropaeolum". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2020-03-22.
  3. Sunset Western Garden Book. 1995. 606–607; "Tropaeolum". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  4. "nasturtium". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2020-03-22.
  5. "nasturtium". Merriam-Webster.com Dictionary. Merriam-Webster. Retrieved 2016-01-21.
  6. "Nasturtium". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  7. Linnæus, Carl (1753-05-01). Species Plantarum : exhibentes plantas rite cognitas ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema sexuale digestas [The Species of Plants] (in Latin). Vol. 1. Stockholm, Sweden: Laurentius Salvius. p. 345.
  8. Heywood, V.H.; Brummitt, R.K.; Culham, A.; Seberg, O. (2007). Flowering plant families of the world. Firefly Books. p. 324. ISBN 978-1554072064.
  9. Frampton, John (1580). Joyfull newes of the newfound world.
  10. ^ Woodward, M. (1969). Leaves from Gerard's Herball arranged for garden lovers. Dover publications Inc., New York. pp. 168–169. ISBN 9780486223438.
  11. ^ Perry, Frances (1972). Flowers of the World. The Hamlyn Publishing Group. pp. 298–300. ISBN 978-0600355922.
  12. Carpenter, Humphrey, ed. (2023) . The Letters of J. R. R. Tolkien: Revised and Expanded Edition. New York: Harper Collins. Letter 148 of 7 August 1954. ISBN 978-0-35-865298-4.
  13. Allaby, Michael, ed. (1992). The Concise Oxford Dictionary of Botany. Oxford: Oxford University Press. p. 418. ISBN 978-0198661634.
  14. McClintock, Elizabeth. "Tropaeolaceae: Nasturtium Family". Jepson Flora Project. Retrieved 2012-06-20.
  15. McFarlane, J. S. (2001-12-29). "The Genus Tropaeolum". Archived from the original on 2012-07-02. Retrieved 2012-06-05.
  16. "Tropaeolum majus Alaska Series (v) AGM". Royal Horticultural Society. Retrieved 2012-09-08.
  17. "Tropaeolum majus 'Hermine Grashoff' (d) AGM". Royal Horticultural Society. Retrieved 2012-09-08.
  18. "Tropaeolum Whirlybird Series AGM". Royal Horticultural Society. Retrieved 2012-09-08.
  19. ^ "Tropaeolum: Tropaeolum tricolor". Pacific Bulb Society. Retrieved 2012-06-23.
  20. "Tropaeolum polyphyllum". Rare Plants. Retrieved 2014-06-04.
  21. "Tropaeolum speciosum AGM". Royal Horticultural Society. Retrieved 2012-09-08.
  22. "Mashua Ethnobotanical Leaflet". Southern Illinois University. Retrieved 2012-06-21.
  23. "Tropaeolum tuberosum var. lineamaculatum 'Ken Aslet' AGM". Royal Horticultural Society. Archived from the original on 2013-06-15. Retrieved 2012-09-08.
  24. "Tropaeolum". Pacific Bulb Society. Retrieved 2012-06-23.
  25. "Tropaeolum minus". Plants For A Future. Retrieved 2012-06-05.
  26. "Parsley, fresh (SR Legacy, 170416)". FoodData Central - National Agricultural Library - USDA. Retrieved 14 October 2024.
  27. Niizu, P.Y. & Rodriguez-Amaya, Delia B. (2005). "Flowers and leaves of Tropaeolum majus L. as rich sources of lutein". Journal of Food Science. 70 (9): S605 – S609. doi:10.1111/j.1365-2621.2005.tb08336.x. ISSN 1750-3841.
  28. Owen, Marion. "Poor Man's Capers: How to make gourmet capers from nasturtium seed pods". Retrieved 2012-06-24.
  29. Portrait of a Medicinal Plant (Original title: Portraet einer Heilpflanze. Tropaeolum majus L. - die Kapuzinerkresse. Merkurstab 1995; 48:357-62. English by A. R. Meuss, FIL, MTA.)
  30. Goos, K. H.; Albrecht, U; Schneider, B (2006). "Efficacy and safety profile of a herbal drug containing nasturtium herb and horseradish root in acute sinusitis, acute bronchitis and acute urinary tract infection in comparison with other treatments in the daily practice/results of a prospective cohort study". Arzneimittelforschung. 56 (3): 249–57. doi:10.1055/s-0031-1296717. PMID 16618018. S2CID 45531401.
  31. Hummel, K. Use plants for pest control. Archived 2015-02-14 at the Wayback Machine Coles County Yard and Garden. University of Illinois Extension.
  32. "Companion Planting" (PDF). Cornell Cooperative Extension. Chemung County. May 1999. Archived from the original (PDF) on May 29, 2014.
  33. Linda Chalker-Scott, Ph.D. (February 20, 2008). "The Myth of Companion Plantings - "Certain species will thrive, lean on, nestle with, and support each other in groupings"" (PDF). Washington State University.
  34. Andersson, Lennart & Andersson, Stephan (2000). "A molecular phylogeny of Tropaeolaceae and its systematic implications". Taxon. 49 (4): 721–736. doi:10.2307/1223973. JSTOR 1223973.
  35. "Tropaeolum". The Plant List. 2010. Retrieved 2012-06-23.
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