Stephanomeria paniculata

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 428. 1841.

Common names: Stiff-branched wirelettuce
Endemic
Treatment appears in FNA Volume 19. Treatment on page 356. Mentioned on page 351, 352.

Annuals, 0–100 cm. Stems single, branched (branches nearly at right angles, stiff), glabrous. Leaves withered at flowering; basal blades oblanceolate, 6–10 cm, margins entire or toothed (teeth minute, faces glabrous); cauline much reduced, bractlike. Heads borne singly along branches or in paniculiform arrays. Peduncles 2–10 mm. Calyculi of appressed bractlets. Involucres 6–9 mm. Florets 5. Cypselae light to dark tan, 3.8–4.2 mm, faces slightly bumpy to tuberculate, (grooved); pappi of 15–18 tan bristles (connate in groups of 2–4, bases persistent), plumose to tops of bases. 2n = 16.


Phenology: Flowering Jun–Sep.
Habitat: Open, sandy or volcanic soils, plains and foothills, often growing as weed along roads
Elevation: 200–1400 m

Distribution

V19-561-distribution-map.gif

Calif., Idaho, Oreg., Wash.

Discussion

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Stephanomeria paniculata"
rounded;acute +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
L. D. Gottlieb +
Nuttall +
oblanceolate +
6 cm60 mm <br />0.06 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 +
filiform +
Stiff-branched wirelettuce +
zygomorphic +, actinomorphic +  and (3-)5-merous +
white +, lavender +  and pink +
light +  and dark tan +
5-angled +  and columnar +
Calif. +, Idaho +, Oreg. +  and Wash. +
200–1400 m +
slightly bumpy +  and tuberculate +
winged +  and beaked +
dispersed +
Open, sandy or volcanic soils, plains and foothills, often growing as weed along roads +
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 /> (0.9 cm9 mm <br />0.009 m <br />) +
cauline +  and basal +
toothed +  and entire +
2-carpellate +
white +  and tan +
persistent +
connate +  and distinct +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jun–Sep. +
connate +  and distinct +
5 +  and 12 +
subequal +  and unequal +
Trans. Amer. Philos. Soc., n. s. +
flat;convex +
slender +  and stout +
exalbuminous +
1 (?) +  and 8 (?) +
appendaged +  and truncate +
papillate +
Undefined tribe Lactuceae +
Stephanomeria paniculata +
Stephanomeria +
species +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
shrub +  and subshrub +