Helenium puberulum

de Candolle in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 667. 1836.

Common names: Rosilla
Treatment appears in FNA Volume 21. Treatment on page 432. Mentioned on page 427, 428.

Annuals or perennials, 50–160 cm. Stems usually 1, branched distally, strongly winged, glabrous proximally, sparsely hairy distally. Leaves glabrous or sparsely hairy; basal blades oblanceolate to oblongelliptic, entire; proximal and mid-blades lanceolate to oblongelliptic, entire; distal blades lance-linear, entire. Heads 4–20 (–30) per plant, in paniculiform arrays. Peduncles (6–) 9–17 (–23) cm, sparsely to moderately hairy. Involucres globose to depressed-globose, 9–15 × 9–17 (–19) mm. Phyllaries (distinct or connate proximally) moderately hairy. Ray-florets 0, or 13–15, pistillate, fertile; corollas yellow, 3.8–10 × 2–4 mm. Disc-florets 300–500 (–1000+); corollas yellow proximally, yellow to reddish-brown to purple distally, (1.6–) 1.9–2.7 mm, lobes 4 (–5). Cypselae 1.2–1.9 mm, moderately hairy; pappi of 5–6 entire, aristate scales 0.4–1 mm. 2n = 58.


Phenology: Flowering (Mar–)Jun–Aug(–Nov).
Habitat: Along streams, ditches, seepage areas, around ponds and lakes, forests, woodlands
Elevation: 0–1200 m

Distribution

V21-1078-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Helenium puberulum may be of amphidiploid origin from hybridization between H. bigelovii (perennial, radiate, 2n = 32) and H. thurberi (annual, rayless, 2n = 26) (M. W. Bierner 1972).

Selected References

None.

Lower Taxa

None.

... more about "Helenium puberulum"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +
indeterminate +  and determinate +
Mark W. Bierner +
de Candolle in A. P. de Candolle and A. L. P. P. de Candolle +
oblanceolate +  and oblongelliptic +
decurrent +
compound +  and simple +
pinnatifid;lobed;spatulate;ovate;spatulate;ovate;oblong;oblanceolate;linear;lanceolate;elliptic +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Rosilla +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
yellow +  and reddish-brown +
0.38 cm3.8 mm <br />0.0038 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
4-5-angled +  and obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Calif. +  and Mexico (Baja California) +
0–1200 m +
gland-dotted +
glabrous or +  and sparsely densely hairy +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Along streams, ditches, seepage areas, around ponds and lakes, forests, woodlands +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
1.7 cm17 mm <br />0.017 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
globose;depressed-globose +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
sessile +  and petiolate +
hairy +  and glabrous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
connate +  and distinct +
ovate +, oblong +, oblanceolate +, linear +, lanceolate +  and elliptic +
unequal +  and subequal +
2-carpellate +
persistent +
17 cm170 mm <br />0.17 m <br /> (23 cm230 mm <br />0.23 m <br />) +
9 cm90 mm <br />0.09 m <br /> (17 cm170 mm <br />0.17 m <br />) +
Flowering (Mar–)Jun–Aug(–Nov). +
9 +  and 34 +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
bearing subulate enations +, hairy +  and bristly +
ovoid;hemispheric;ovoid;hemispheric;globose;conic +
5 +  and 6 +
aristate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
exalbuminous +
winged +  and branched +
1 (?) +  and 10 (?) +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Compositae +
Helenium puberulum +
Helenium +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
perennial +  and annual +
50 cm500 mm <br />0.5 m <br /> (160 cm1,600 mm <br />1.6 m <br />) +
shrub +  and subshrub +