| Thelocactus tulensis | |
|---|---|
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| Conservation status | |
 Least Concern (IUCN 3.1) | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Cactaceae |
| Subfamily: | Cactoideae |
| Genus: | Thelocactus |
| Species: | T. tulensis |
| Binomial name | |
| Thelocactus tulensis (Poselg.) Britton & Rose | |
| Synonyms | |
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Thelocactus tulensis is a species of cactus. It is endemic to Mexico.
Description
Thelocactus tulensis is a solitary, spherical cactus, sometimes slightly elongated, with a dark dull green body up to 25 centimeters high and 8 centimeters in diameter. It has 10 ribs that are bulbous to cone-shaped, up to 2 centimeters high and in diameter, with thick, fleshy warts that have many edges. The areoles are woolly when young, at a distance of 2.5 centimeters, and later become naked. It has 6 to 8 radial spines that are initially brownish and then turn white, measuring only 1 to 1.5 centimeters long. Additionally, it has 1 to 3 central spines that are up to 4 centimeters long, straight or curved, and whitish to horn-colored with a dark tip.
The flowers of Thelocactus tulensis are widespread, measuring 2.5 to 5 centimeters long and 3.5 to 8 centimeters in diameter. Their color varies from silvery white to delicate pink, with a carmine red central stripe. The scar of the flower is pale yellow. The fruits are green to greenish-magenta or whitish-brown, measuring 11 to 18 millimeters long and about 7 to 10 millimeters in diameter. The seeds are dark with a finely tuberous testa cell pattern.
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Flower buds
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Plant habit
Distribution
Thelocactus tulensis is native to the limestone hills in the Chihuahuan Desert in Tamaulipas, Nuevo León, and San Luis Potosí, Mexico at elevations of 1200 to 1900 meters.
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Plant growing near Rayones, Nuevo Leon
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Plant growing in habitat near San Roberto
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Taxonomy
First described as Echinocactus tulensis in 1853 by Heinrich Poselger, the species was later placed in the genus Thelocactus by Nathaniel Lord Britton and Joseph Nelson Rose in 1923. The specific epithet "tulensis" refers to the occurrence of the species near Tula in Mexico.
References
- Sotomayor, M.; Gómez-Hinostrosa, C.; Hernández, H.M.; Smith, M. (2017). "Thelocactus tulensis". IUCN Red List of Threatened Species. 2017: e.T152910A121616648. doi:10.2305/IUCN.UK.2017-3.RLTS.T152910A121616648.en. Retrieved 12 November 2021.
- Anderson, Edward F. (2001). The Cactus Family. Portland, Or: Timber Press (OR). p. 662–663. ISBN 0-88192-498-9.
- "Thelocactus tulensis". LLIFLE. 2013-08-04. Retrieved 2024-05-11.
This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.
- Dietrich, Albert; Otto, Friedrich (1853). "Allgemeine Gartenzeitung". Biodiversity Heritage Library. Retrieved 2024-05-11.
- Britton, Nathaniel Lord; Eaton, Mary E.; Rose, J. N.; Wood, Helen Adelaide (1919). The Cactaceae : descriptions and illustrations of plants of the cactus family. Washington: Carnegie Institution of Washington. doi:10.5962/bhl.title.46288.
External links
Media related to Thelocactus tulensis at Wikimedia Commons
Data related to Thelocactus tulensis at Wikispecies
| Taxon identifiers | |
|---|---|
| Thelocactus tulensis |
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| Echinocactus tulensis | |