Hymenoxys bigelovii

(A. Gray) K. F. Parker

Madroño 10: 159. 1950.

Common names: Bigelow’s rubberweed
Endemic
Basionym: Actinella bigelovii A. Gray Smithsonian Contr. Knowl. 5(6): 96. 1853
Treatment appears in FNA Volume 21. Treatment on page 440. Mentioned on page 435, 436.

Perennials, 20–70 cm (polycarpic, often with sparingly branched, woody caudices). Stems 1–5, green throughout or purple-red-tinted distally to throughout, usually unbranched distally, ± hairy (often tomentose proximally). Leaves: blades usually simple, rarely lobed (lobes 3), glabrous or ± hairy, eglandular or sparsely glanddotted (basal leaf-bases ± long-villous-woolly); mid leaves usually simple, rarely lobed (lobes 3, terminal lobes 1.5–3 mm wide). Heads 1–5 per plant, usually borne singly, sometimes in paniculiform arrays. Peduncles (1.5–) 6–20 (–29) cm, ± hairy, densely tomentose distally near involucres. Involucres hemispheric to broadly campanulate, 13–20 × 23–32 mm. Phyllaries in 2 series, unequal; outer 13–19, basally connate only slightly to 1/5 their lengths, lanceolate to narrowly lanceolate to obovate to oblanceolate, 7–11 mm, apices acuminate to acute; inner 13–18, narrowly lanceolate to oblanceolate, 8.5–12.6 mm, apices aristate. Ray-florets 13–15; corollas yellow, 13–26 × 5.4–9.5 mm. Disc-florets 100–250+; corollas 5.7–7.4 mm. Cypselae narrowly obpyramidal, 4.2–4.7 mm; pappi of 9–11 (–15) obovate to oblanceolate, often aristate scales 4.7–7.3 mm. 2n = 30.


Phenology: Flowering May–Jun.
Habitat: Roadsides, edges of juniper-pine and pine forests
Elevation: 1300–2500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Hymenoxys bigelovii"
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 +
(A. Gray) K. F. Parker +
decurrent +
Actinella bigelovii +
sparsely +, eglandular +  and simple +
hairy +  and glabrous +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Bigelow’s rubberweed +
1.3 cm13 mm <br />0.013 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
0.57 cm5.7 mm <br />0.0057 m <br /> (0.74 cm7.4 mm <br />0.0074 m <br />) +
0.54 cm5.4 mm <br />0.0054 m <br /> (0.95 cm9.5 mm <br />0.0095 m <br />) +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +  and N.Mex. +
1300–2500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, edges of juniper-pine and pine forests +
discoid +  and radiate +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (2 cm20 mm <br />0.02 m <br />) +
hemispheric;broadly campanulate +
2.3 cm23 mm <br />0.023 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
lanceolate +  and narrowly lanceolate +
unequal +  and subequal +
0.7 cm7 mm <br />0.007 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
2-carpellate +
persistent +
20 cm200 mm <br />0.2 m <br /> (29 cm290 mm <br />0.29 m <br />) +
tomentose +  and hairy +
6 cm60 mm <br />0.06 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Flowering May–Jun. +
28 +  and 50 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid;conic;ovoid;hemispheric +
9 +  and 11 +
aristate +, obovate +  and oblanceolate +
0.47 cm4.7 mm <br />0.0047 m <br /> (0.73 cm7.3 mm <br />0.0073 m <br />) +
exalbuminous +
subequal;unequal +
green throughout or purple-red-tinted +
1 +  and 5 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dugaldia +  and Plummera +
Hymenoxys bigelovii +
Hymenoxys +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
narrowly lanceolate +  and oblanceolate +
0.85 cm8.5 mm <br />0.0085 m <br /> (1.26 cm12.6 mm <br />0.0126 m <br />) +
shrub +  and subshrub +