Blepharizonia laxa


Bull. Calif. Acad. Sci. 1: 279. 1885.

Basionym: Hemizonia plumosa var. subplumosa A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 312. 1884
Synonyms: Blepharizonia plumosa subsp. viscida D. D. Keck Blepharizonia plumosa var. subplumosa (A. Gray) Jepson
Treatment appears in FNA Volume 21. Treatment on page 290. Mentioned on page 291.

Herbage yellowish green, usually densely stipitate-glandular distally and with scattered to abundant tack-glands. Heads usually borne singly or in ± racemiform-paniculiform arrays (branches ± virgate). Involucres ± glabrate or hirsute to hispid, usually with scattered to abundant tack-glands as well. Disc pappi 0 or 0.1–1 mm. 2n = 28.

Phenology: Flowering Jul–Nov.
Habitat: Openings in woodlands, chaparral, grasslands
Elevation: 0–1500 m


Blepharizonia laxa occurs widely in the Inner South Coast Ranges (rarely in the Outer South Coast Ranges) north to the eastern San Francisco Bay area and northwestern San Joaquin Valley. Most recent workers have treated the taxon as a subspecies or variety of B. plumosa; following B. G. Baldwin et al. (2001), we recognize B. laxa at species rank based on molecular and biosystematic evidence for extensive evolutionary divergence. Where B. laxa and B. plumosa co-occur, the two species remain distinct and appear to be ecologically divergent, in addition to being only minimally interfertile (Baldwin et al.).

Selected References


Lower Taxa

... more about "Blepharizonia laxa"
Bruce G. Baldwin +  and John L. Strother +
Greene +
Hemizonia plumosa var. subplumosa +
0–1500 m +
Openings in woodlands, chaparral, grasslands +
Flowering Jul–Nov. +
Bull. Calif. Acad. Sci. +
Blepharizonia plumosa subsp. viscida +  and Blepharizonia plumosa var. subplumosa +
Blepharizonia laxa +
Blepharizonia +
species +