Thelocactus rinconensis

Thelocactus rinconensis
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Cactaceae
Subfamily:	Cactoideae
Genus:	Thelocactus
Species:	T. rinconensis
Binomial name
Thelocactus rinconensis (Poselg.) Britton & Rose[2]
Synonyms[2]
Echinocactus lophothele Salm-Dyck Echinocactus nidulans Quehl Echinocactus phymatothelos Poselg. Echinocactus rinconensis Poselg. Thelocactus lophothele (Salm-Dyck) Britton & Rose Thelocactus nidulans (Quehl) Britton & Rose Thelocactus phymatothele (Poselg.) Britton & Rose Thelocactus rinconensis subsp. freudenbergeri (R.Haas) Mosco & Zanov. Thelocactus rinconensis subsp. hintonii Lüthy Thelocactus rinconensis subsp. icamolensis Halda & Kupčák Thelocactus rinconensis subsp. nidulans (Quehl) Glass Thelocactus rinconensis subsp. palomaensis Pavlíček & Zatloukal Thelocactus rinconensis subsp. phymatothelos (Poselg.) Glass Thelocactus rinconensis var. freudenbergeri R.Haas Thelocactus rinconensis var. nidulans (Quehl) Glass & R.A.Foster Thelocactus rinconensis var. phymatothelos (Poselg.) Glass & R.A.Foster

Thelocactus rinconensis, synonyms including Thelocactus nidulans, is a species of cactus. It is endemic to north-east Mexico.[2]

Description

Thelocactus rinconensis is a small perennial gray-green cactus, growing 6 - 8 centimeters high and is between 12 - 20 centimeters in diameter. It has 20-25 ribs with marked with angular tubercles. The areolas are 2 to 2.5 centimeters apart, circular or elliptical and covered with white wooly hairs. Areoles have 3 to 4 central spines are 6 - 8 centimeters long It features up to six dark brown to black main spines and thin, radial spines that are 1.3-1.5 cm long. Flowers, about 4 cm long and 2.5-7.5 cm wide, are funnel-shaped and yellow or whitish, growing from new growth at the top of the plant. Fruits are spherical to oblong with scales, 7-9 mm in diameter, greenish or yellowish. Seeds are 1.7-2 mm long[3]

• 
  Pink flower cultivar
• 
• 
  White flower plant

Distribution

The plant is found in the Chihuahuan Desert of Coahuila and Nuevo Leon, Mexico growing at elevations of 1200-1900 meters growing in xerophytic shrubland on calcareous soils.[4]

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  Plant growing near La Gloria in Nuevo Leon
• 

Taxonomy

Echinocactus rinconensis was described in The Cactaceae in 1855 by Heinrich Poselger.[5] Nathaniel Lord Britton and Joseph Nelson Rose placed the species in the genus Thelocactus in 1923.[6]

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  Botanical illustration plate from Iconographia Cactacearum
• 
  Botanical illustration plate from Iconographia Cactacearum

References

1. Gómez-Hinostrosa, C.; Hernández, H.M.; Sotomayor, M.; Smith, M. (2017). "Thelocactus rinconensis". IUCN Red List of Threatened Species. 2017: e.T152644A121602595. doi:10.2305/IUCN.UK.2017-3.RLTS.T152644A121602595.en. Retrieved 13 November 2021.
2. "Thelocactus rinconensis (Poselg.) Britton & Rose". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2024-02-20.
3. "Find Trees & Learn". University of Arizona Campus Arboretum. Retrieved 2024-05-09.
4. "Thelocactus rinconensis". LLIFLE. 2013-08-04. Retrieved 2024-05-09. This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.
5. Dietrich, Albert; Otto, Friedrich (1855). "Allgemeine Gartenzeitung". Biodiversity Heritage Library. Retrieved 2024-05-09. This article incorporates text from this source, which is available under the CC BY-SA 3.0 license.
6. 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.

• Nathaniel Lord Britton, Joseph Nelson Rose The Cactaceae: Descriptions and Illustrations of Plants of the Cactus family, Volume 3

External links

• Media related to Thelocactus rinconensis at Wikimedia Commons
• Data related to Thelocactus rinconensis at Wikispecies