Holocarpha virgata

(A. Gray) D. D. Keck

Aliso 4: 111. 1958.

IllustratedEndemic
Basionym: Hemizonia virgata A. Gray in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 100. 1859
Treatment appears in FNA Volume 21. Treatment on page 288. Mentioned on page 287.

Plants 20–120 cm.; stems usually notably stipitate-glandular, rarely merely ± resinous distally. Heads borne singly (at ends of branches) or in ± racemiform to spiciform arrays. Involucres ± obconic to campanulate. Phyllaries each bearing 5–20 gland-tipped processes and glabrous or minutely sessile or stipitate-glandular. Ray-florets 3–7. Disc-florets 9–25; anthers reddish to dark purple. 2n = 8.

Discussion

Subspecies 2 (2 in the flora).

Holocarpha virgata occurs widely in the Great Valley and bordering foothills of the Coast Ranges and Sierra Nevada in northern and central California (subsp. virgata); it is disjunct in southwestern California (e.g., subsp. elongata near San Diego). Different populations are often intersterile and distinguished by chromosomal rearrangements.

Selected References

None.

Key

1 Stem branches ± gracile, ± pliable; peduncles 0–5(–15) cm Holocarpha virgata subsp. elongata
1 Stem branches ± virgate, ± rigid; peduncles 0–5+cm Holocarpha virgata subsp. virgata
... more about "Holocarpha virgata"
not tailed +, rounded +  and obtuse +
reddish +  and dark purple +
pale +  and dark +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
less racemiform +  and spiciform +
indeterminate +  and determinate +
Bruce G. Baldwin +  and John L. Strother +
(A. Gray) D. D. Keck +
decurrent +
Hemizonia virgata +
compound +  and simple +
linear to linear-elliptic +
linear;oblanceolate +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
hairy +  and glabrous +
fusiform +, clavate +, obpyramidal +, terete +, compressed +  and obcompressed +
fertile +  and bisexual +
fertile +  and bisexual +
hirsute +  and strigose sericeous or villous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
in more or less racemiform to spiciform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
less obconic;campanulate +
petiolate +  and sessile +
alternate +  and opposite +
deltate +
entire +, serrate +  and serrulate +
2-carpellate +
persistent +
stipitate-glandular +  and glabrous +
3 +  and 16 +
alternate +  and opposite +
obcompressed +
flat;convex +
exalbuminous +
Illustrated +  and Endemic +
resinous +
stipitate-glandular +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Holocarpha virgata +
Holocarpha +
species +
cylindric +
toothed +  and entire +
10 cm100 mm <br />0.1 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +