Misplaced Pages

Amitostigma: Difference between revisions

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Browse history interactively← Previous editNext edit →Content deleted Content addedVisualWikitext
Revision as of 19:26, 23 December 2004 editJoJan (talk | contribs)Autopatrolled, Administrators172,408 edits link← Previous edit Revision as of 19:31, 23 December 2004 edit undoJoJan (talk | contribs)Autopatrolled, Administrators172,408 edits linkNext edit →
Line 11: Line 11:
{{taxobox subtribus entry | taxon = Orchidinae}} {{taxobox subtribus entry | taxon = Orchidinae}}
{{Taxobox alliance entry | taxon = Orchis}} {{Taxobox alliance entry | taxon = Orchis}}
{{Taxobox genus entry | taxon = '''''Amitostigma'''''| authorname = ], 1919}} {{Taxobox genus entry | taxon = '''''Amitostigma'''''}}
{{Taxobox_end_placement}} {{Taxobox_end_placement}}
{{Taxobox_section_subdivision | color = lightgreen | plural_taxon = <center>Species</center>}} {{Taxobox_section_subdivision | color = lightgreen | plural_taxon = <center>Species</center>}}

Revision as of 19:31, 23 December 2004

Template:Taxobox begin Template:Taxobox begin placement Template:Taxobox regnum entry Template:Taxobox divisio entry Template:Taxobox classis entry Template:Taxobox ordo entry Template:Taxobox familia entry Template:Taxobox subfamilia entry Template:Taxobox tribus entry Template:Taxobox subtribus entry Template:Taxobox alliance entry Template:Taxobox genus entry Template:Taxobox end placement Template:Taxobox section subdivision See text Template:Taxobox end

Amitostigma Schltr. 1919, is a genus in the orchid family (Orchidaceae), subfamily Orchidoideae, tribe Orchideae, subtribe Orchidinae, alliance Orchis

It is an exclusively Asian genus of 27 orchids, growing in the alpine habitats of east Asia, India, eastern Himalaya, China, and Japan to Kuril Islands, of which 22 grow species in China.

These are dwarf terrestrial orchids, including some saprophytic species. The globose or ovoid tubers (1-1,5 cm) of these autotrophic plants are fleshy and not lobed, with several slender roots. New shoots grow each tuber.

The stem is usually erect, with 1 (or rarely 2 or 3) basal or cauline (= belonging to the stem) leaves. The length of the stem can vary between 5 and 45 cm.

The green leaf blade is not articulate and can have an oblong, lanceolate, elliptic, or ovate form, even within the same species (see A. lepidum). The leaves appear at the time of expansion of the flower (= anthesis).

The terminal inflorescence is racemose, seldom subcapitate. The floral bracts are often lanceolate. The cylindrical to fusiform ovary is resupinate (= turned upside down).

Each inflorescence shows many (rarely 1 or 2) flowers. These are also resupinate and usually twisted to one side.

The sepals are completely separate from each other, with an oblong to ovate appearance, and usually 1-veined. The erect petals are straight, often slightly broader than the sepals. The 3- or 4-lobed lip is usually longer and broader than the petals and sepals, spurred at the base. The mid-lobe is oblong, square, or ovate. The margin of the lip is often slightly undulate.

They have a characteristic short column. The erect anthers are cohesive with the column through its broad base or back.. They have two parallel locules with farinaceous, sectile pollinia. The small rostellum is beak-shaped, attached with its folded end to the viscidium. The two protuding stigmas are slightly club-shaped

The capsule is suberect.

The color may vary within the same species : Amitostigma lepidum may show a purple lip with white margins, or a white lip with purple dots or a totally white lip. Even the leaves may vary from lanceolate to ovate within the same species.

After flowering, the leaves turn yellow color and die off.The plants then starts its summer dormancy for several months. This cycle is well adapted to a climate which is hot and dry in summer.


Species

  • Amitostigma alpestre : Alpine Chicken Orchid (Taiwan).
  • Amitostigma amplexifolium (SC. China)..
  • Amitostigma basifoliatum (China).
  • Amitostigma bifoliatum (China).
  • Amitostigma capitatum (China) .
  • Amitostigma dolichocentrum (China) .
  • Amitostigma faberi (China)
  • Amitostigma farreri (Tibet)..
  • Amitostigma gonggashanicum (China).
  • Amitostigma gracile (China to Temp. E. Asia).
  • Amitostigma keiskei (Japan)
  • Amitostigma keiskeoides (Vietnam).
  • Amitostigma kinoshitae (S. Kuril Is., Japan - Hokkaido, N. Honshu).
  • Amitostigma kurokamianum (Japan - Kyushu: Mt. Kurokami).
  • Amitostigma lepidum : Okinawa Orchid (Japan - S. Kyushu to Nansei-shoto.
  • Amitostigma monanthum (SE. Tibet to C. China).
  • *Amitostigma monanthum var. forrestii (Tibet). Tuber geophyte
  • *Amitostigma monanthum var. monanthum (SE. Tibet to C. China). Tuber geophyte
  • Amitostigma papilionaceum (China - NW. Sichuan).
  • Amitostigma parciflorum (China).
  • Amitostigma physoceras (China - Sichuan)..
  • Amitostigma pinguicula (China).
  • Amitostigma simplex (hina - W. Sichuan, SW. Yunnan)..
  • Amitostigma tetralobum (China - SW. Sichuan, N. Yunnan).
  • Amitostigma thailandicum (Thailand).
  • Amitostigma tibeticum (Tibet).
  • Amitostigma tominagai (Taiwan).
  • Amitostigma trifurcatum (China)..
  • Amitostigma yueanum (China - Yunnan).

This category should contain only articles about the Amitostigma of orchids, when the articles are at the scientific name, or redirects from the scientific name in the case of monotypic taxa or articles at the English name. The only subcategories should be those that contain such articles or redirects (e.g. "Category:subtaxon Amitostigma"). It should not contain any other categories.

For guidance on categorizing articles on plant Amitostigma by rank, see Misplaced Pages:WikiProject Plants/Categorization#Taxonomic rank categories.


For more information, see List of Orchidaceae genera.