Senecio bigelovii

A. Gray in War Department [U.S.]

in War Department [U.S.], Pacif. Railr. Rep. 4(5): 111. 1857.

IllustratedEndemic
Synonyms: Ligularia bigelovii (A. Gray) W. A. Weber
Treatment appears in FNA Volume 20. Treatment on page 549. Mentioned on page 546.

Perennials, (20–) 40–80 (–120) cm (caudices fibrous-rooted). Herbage usually floccose-tomentose to glabrescent, sometimes glabrous. Stems single or loosely clustered. Leaves progressively reduced distally; petiolate (proximal); blades ovate to lanceolate, 7–15 × (1–) 2–5 cm, bases contracted or tapered, margins subentire or serrate to dentate (mid and distal leaves similar, sessile, bractlike, often clasping). Heads nodding (especially when young), (1–) 3–12 (–20) in racemiform or paniculiform arrays (terminal heads often largest). Calyculi of 4–10 linear bractlets (lengths mostly 1/3–1/2 phyllaries, sometimes 1 or 2 equaling phyllaries). Phyllaries ± 13 or ± 21, 6–12 mm, tips green. Ray-florets 0. Cypselae glabrous. 2n = 40.

Distribution

V20-1205-distribution-map.gif

Ariz., Colo., N.Mex., Utah, Wyo., s Rocky Mountains and adjacent areas of the United States

Discussion

Varieties 2 (2 in the flora).

The two varieties of Senecio bigelovii are distinguished by morphologic tendencies and by geography.

Selected References

None.

Key

1 Herbage glabrous or nearly so (at flowering); blades of proximal leaves often abruptly contracted or at least obtuse at bases; mid and distal leaves clasping; phyllaries mostly 13, 6–8+ mm Senecio bigelovii var. bigelovii
1 Herbage often floccose-tomentose, especially among heads and on abaxial faces of leaves; blades of proximal leaves usually tapered to petioles; mid and distal leaves weakly, if at all, clasping; phyllaries mostly 21, (7–)8–12 mm Senecio bigelovii var. hallii
... more about "Senecio bigelovii"
not tailed +, rounded +  and obtuse +
papillate +
scarious +
usually ovate +  and lance-linear +
paniculiform +  and racemiform +
indeterminate +  and determinate +
Theodore M. Barkley† +
A. Gray in War Department [U.S.] +
tapered +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
ovate;lanceolate +
2cm;5cm +
winged;nerved;ribbed +
barbellulate +  and smooth +
white +  and stramineous +
purplish +, reddish +, white +, ochroleucous +, yellow +  and white rarely reddish +
angled +, 5-ribbed +, prismatic +  and cylindric +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, N.Mex. +, Utah +, Wyo. +  and s Rocky Mountains and adjacent areas of the United States +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and radiate +
indeterminate +
heterogamous +  and homogamous +
glabrous +, usually floccose-tomentose +  and glabrescent +
each +  and sessile +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
turbinate;campanulate +
cauline +  and basal +
reduced +
erect;recurved +
deltate +
dentate to pinnatifid +  and entire +
serrate to dentate +  and subentire +
2-carpellate +
persistent +
mostly oblong +  and lanceolate or linear +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
in War Department [U.S.], Pacif. Railr. Rep. +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
exalbuminous +
Illustrated +  and Endemic +
appendaged +  and truncate +
papillate +
Ligularia bigelovii +
Senecio bigelovii +
species +
campanulate +
denticulate +  and serrate or toothed +
80 cm800 mm <br />0.8 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
shrub +  and subshrub +