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Thelocactus tulensis (Poselger) Britton & Rose, Cact. 4: 11 (1923).
Basionym: Echinocactus tulensis Poselger, Allg. Gartenz. 21: 125 (1853).
Neotype: At KM14 on highway 101 between Tula and the junction at hy. 80 in Tamaulipas, 30 July 1979, Edward F. Anderson 3202 (US).
Synonyms: Thelocactus tulensis ssp. huizachensis Halda & Sladkovsky, Acta Mus. Richnov. sect. Nat. 7: 39 (2000). Thelocactus tulensis ssp. kupcakii Halda & Sladkovsky, Acta Mus. Richnov. sect. Nat. 7: 40 (2000). Thelocactus vaskoanus Halda & al., Acta Mus. Richnov. sect. Nat. 7: 75 (2000). Thelocactus tulensis ssp. vaskoanus Halda & al., Acta Mus. Richnov. sect. Nat. 9: 41 (2002).
Description
Stem single or clustering, globose to elongate, 10-25 cm tall, 6-8 cm wide. Ribs 8-13, distinct. Tubercles rounded. Areoles without glands. Central spines 1-4, 30-80 mm long, straw coloured to whitish, straight to twisted, flattened. Radial spines 5-12, 7-20 mm long, straight, acicular. Flowers 30-60 mm wide, white or light pink. Seeds with tabular testa cells, cuticle granular.
Distribution
Mexico, San Luis Potosí and Tamaulipas, occurring in matorral xerofilo on limestone hills.
Comments
Tula is a small town in the state of Tamaulipas, and this species takes its name from it. Thelocactus tulensis may be found in the wild from Tula to Las Tablas and Huizache in San Luis Potosí.
- Huizachensis refers to a form found near Huizache, intermediate between tulensis and bicolor.
- Kupcaki is the name given to a form with longer spines occurring near Las Tablas.
Thelocactus tulensis
Huizache, San Luis Potosí
Photo: A. Mosco
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Thelocactus tulensis
Rancho Nuevo, San Luis Potosí
Photo: A. Mosco
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Thelocactus tulensis
Rancho Nuevo, San Luis Potosí
Photo: A. Mosco
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Thelocactus tulensis
La Morita, San Luis Potosí
Photo: A. Mosco
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home | © Alessandro Mosco 2004 | Last updated: 07-08-2005
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