On-line Key to Ceanothus species

Subgenus: Cerastes

Description of the subgenus

View the entire key to the subgenus
Ceanothus subg. Cerastes Weberbauer Nat. Pflanzenfam. 3(5): 414 (check page#). 1896 Ceanothus sect. Cerastes S. Watson Proc. Am. Acad. Arts Sci., 10, 338. 1875 Weberbauer Nat. Pflanzenfam. 3(5): 413--414. 1896 also recognized sect. rigidi (Rigidae). Apparently valid.

Leaves usually opposite (alternate in C. verrucosus, C. megacarpus, alternate and opposite in some C. insularis specimens), thick, bases 1-veined, stomata on abaxial leaf blade surfaces in cavities surrounded by pubescence; fruits usually with horns, intermediate valve crests present or not; inflorescences umbel-like or raceme-like arrangement of umbel-like clusters.

Key to the species of Ceanothus subg. Cerastes

1. Leaves alternate or alternate and opposite - 2.

1. Leaves opposite - 4.

This document was last updated: Thursday, 07-Mar-1996 13:52:55 PST