Blepharizonia laxa

Greene

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

Endemic
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

Discussion

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

None.

Lower Taxa

None.
... more about "Blepharizonia laxa"
not tailed +, rounded +  and obtuse +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
spiciform +, paniculiform +  and racemiform-paniculiform +
indeterminate +  and determinate +
Bruce G. Baldwin +  and John L. Strother +
Greene +
decurrent +
Hemizonia plumosa var. subplumosa +
compound +  and simple +
linear to linear-elliptic +
lanceolate;narrowly spatulate;linear or distal +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
whitish +  and purplish +
hairy +  and glabrous +
obcompressed +  and terete +
fertile +  and bisexual +
fertile +  and bisexual +
ciliate;plumose +
0–1500 m +
sericeous +, hirsute +  and strigose sericeous pilose or villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Openings in woodlands, chaparral, grasslands +
in more or less racemiform-paniculiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
yellowish green +
stipitate-glandular +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
less glabrate or hirsute +  and hispid +
obconic;more or less globose +
petiolate +  and sessile +
alternate +  and opposite +
cauline +  and basal +
lanceolate +
serrate +  and entire +
2-carpellate +
persistent +
Flowering Jul–Nov. +
abaxially canescent +  and hirsute or hispid +
1/2 +, 5 +  and 13 +
alternate +  and opposite +
Bull. Calif. Acad. Sci. +
coroniform +
convex;conic +
exalbuminous +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Blepharizonia plumosa subsp. viscida +  and Blepharizonia plumosa var. subplumosa +
Blepharizonia laxa +
Blepharizonia +
species +
cylindric +
toothed +  and entire +
10 cm100 mm <br />0.1 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +
shrub +  and subshrub +