Echinocereus pectinatus |
Echinocereus rigidissimus |
|
---|---|---|
Mexican comb hedgehog, rainbow cactus |
Arizona rainbow cactus, rainbow hedgehog cactus |
|
Echinocereus pectinatus |
Echinocereus rigidissimus |
|
Distribution |
TX; n Mexico
|
AZ; NM; Mexico
|
Discussion | Varieties 2 (1 in the flora). At least in the United States, Echinocereus pectinatus (diploid) has only pink or purple flowers, unlike the polymorphic species E. dasyacanthus (tetraploid). Echinocereus pectinatus differs from the entire E. reichenbachii species group in that the areoles of its relatively thick-walled flower tube have stouter spines and much shorter hairs. Superficially similar species west of the Continental Divide, formerly associated with E. pectinatus (E. pseudopectinatus, E. rigidissimus, and some Sonoran species), are more closely related to the E. reichenbachii species group with densely bristly flower buds and delicate, ephemeral inner tepals. Echinocereus pectinatus var. pectinatus is endemic to Mexico; reports from the United States were misidentifications of var. wenigeri, E. pseudopectinatus (in Arizona), and unusually short-spined plants of E. dasyacanthus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 4. | FNA vol. 4. |
Parent taxa | Cactaceae > subfam. Cactoideae > Echinocereus | Cactaceae > subfam. Cactoideae > Echinocereus |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Echinocactus pectinatus | Cereus pectinatus var. rigidissimus, E. pectinatus var. rigidissimus |
Name authority | (Scheidweiler) Engelmann: in F. A. Wislizenus, Mem. Tour N. Mexico, 109. (1848) | (Engelmann) F. Haage: Special Preisverz., 13. (1897) |
Web links |