Stephanomeria virgata

Bentham

Bot. Voy. Sulphur, 32. 1844.

Common names: Virgate wirelettuce
Illustrated
Treatment appears in FNA Volume 19. Treatment on page 359. Mentioned on page 350, 351, 352, 353, 354.

Annuals, 50–200 cm. Stems single, branches virgate, usually glabrous, rarely tomentose. Leaves withered at flowering; basal blades oblanceolate to spatulate, runcinate, 3–10 cm, margins pinnately lobed (faces usually glabrous, rarely tomentose); cauline much reduced, bractlike. Heads borne singly or clustered along branches. Peduncles 3–10 mm, bracteate. Calyculi of appressed or reflexed bractlets. Involucres 6–8 mm. Florets 5–9. Cypselae light tan to dark-brown, 2.2–3.6 mm, faces smooth to tuberculate, not grooved; pappi (falling) of 23–28, white bristles, wholly plumose. 2n = 16.

Distribution

V19-567-distribution-map.gif

Calif., Nev., Oreg., nw Mexico

Discussion

Subspecies 2 (2 in the flora).

The two subspecies of Stephanomeria virgata are often sympatric in southern California. Hybrids are found frequently.

Selected References

None.

Key

1 Bractlets of calyculi reflexed; florets 8–9 Stephanomeria virgata subsp. virgata
1 Bractlets of calyculi appressed; florets 5–6 Stephanomeria virgata subsp. pleurocarpa

"fine" is not a number.

... more about "Stephanomeria virgata"
rounded;acute +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
L. D. Gottlieb +
Bentham +
runcinate +, oblanceolate +  and spatulate +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
decurrent +
compound +  and simple +
runcinate;linear;oblong oblanceolate or spatulate +
tuberculate +, rugose +, muricate +  and smooth +
reflexed +  and appressed +
tomentose +  and glabrous +
filiform +
Virgate wirelettuce +
zygomorphic +, actinomorphic +  and (3-)5-merous +
white +, lavender +  and pink +
light tan +  and dark-brown +
5-angled +  and columnar +
Calif. +, Nev. +, Oreg. +  and nw Mexico +
not grooved +
smooth +  and tuberculate +
winged +  and beaked +
dispersed +
clustered +  and or +
indeterminate +
each +  and sessile +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
less cylindric;turbinate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cauline +  and basal +
2-carpellate +
white +  and tan +
persistent +
connate +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
connate +  and distinct +
5 +  and 12 +
subequal +  and unequal +
Bot. Voy. Sulphur, +
flat;convex +
slender +  and stout +
exalbuminous +
Illustrated +
branched +  and simple +
1 (?) +  and 8 (?) +
hairy +  and glabrous +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Stephanomeria virgata +
Stephanomeria +
species +
50 cm500 mm <br />0.5 m <br /> (200 cm2,000 mm <br />2 m <br />) +
shrub +  and subshrub +