Thelocactus rinconensis

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

Thelocactus rinconensis
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Thelocactus
Species:
T. rinconensis
Binomial name
Thelocactus rinconensis
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

Description

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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]

Distribution

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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]

Taxonomy

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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]

References

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  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. ^ a b c "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.
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