CF > Encyclopédie > Acanthocereus > occidentalis

Acanthocereus occidentalis Britton & Rose 1920

Publication The Cactaceae 2: 125, fig. 185 (1920).
Type : Rose et al. 13431, Mexique, Sinaloa, San Blas, 24 mars 1910, conservé dans le United States National Herbarium du Smithsonian Institution (US : holotype).

Synonyme de

Acanthocereus tetragonus (Linné) Hummelinck 1938

Commentaires

Description originale:
"5. Acanthocereus occidentalis sp. nov.
Stems rather weak, forming dense thickets; branches slender, 4 to 5 cm. in diameter, 3 to 5-angled, dull green, often bronzed; margins of ribs slightly sinuate; areoles 1 to 3 cm. apart, filled with short brown wool; spines numerous, nearly equal, yellowish, acicular, up to 7 cm.long; flowers 14 to 18 cm. long; fruit unknown.
Common on the western coast of Mexico, where it was frequently collected by Rose, Standley, and Russell at the following places: San Blas, Sinaloa, March 24, 1910 (No. 13431,type); Mazatlan, April 4, 1910 (No. 14050); Guadalupe, April 18, 1910 (No. 14752); and by Dr. Rose at Rosario in 1897 (No. 3170).
This species is widely separated geographically from the others of this genus, being confined to low thickets along the coast of Sinaloa, western Mexico.
Figure 185 shows part of a joint of a plant brought by Dr.Rose from Sinaloa in 1910."

Étymologie

Acanthocereus: du grec akantha, épine: cierge épineux.
occidentalis : du latin occidens, soleil couchant : de l’ouest, en référence à la région d’origine, la côte Pacifique du Mexique.