Hymenoxys vaseyi

(A. Gray) Cockerell

Bull. Torrey Bot. Club 31: 493. 1904.

Common names: Vasey’s rubberweed or bitterweed
EndemicConservation concern
Basionym: Actinella vaseyi A. Gray Proc. Amer. Acad. Arts 17: 219. 1882
Treatment appears in FNA Volume 21. Treatment on page 442. Mentioned on page 437.

Perennials, 20–60 cm (polycarpic; often with moderately branched, woody caudices). Stems 1–10, green throughout or sometimes purple-red-tinted proximally, sparingly or moderately branched distally, ± hairy. Leaves: blades usually lobed (lobes 3–23), glabrous or sparsely hairy, glanddotted (basal leaf-bases sparsely, if at all, long-villous-woolly); mid leaves lobed (lobes 5–21, terminal lobes 0.8–1.2 mm wide). Heads 10–50+ per plant, in paniculiform to corymbiform arrays. Peduncles 1.5–5.5 cm, ± hairy. Involucres campanulate, 8–9 × 8–11 mm. Phyllaries in 2 series, unequal; outer 8–11, basally connate 1/2–2/3 their lengths, obovate, 4.5–6 mm, apices acute; inner 8–12, obovate, 4.5–6 mm, apices mucronate. Ray-florets 8–11; corollas yellow, 9–15 × 4–7 mm. Disc-florets 25–80+; corollas 3.5–4.2 mm. Cypselae narrowly obpyramidal, 2–2.7 mm; pappi of 5–6 obovate, aristate scales 1.7–2.7 mm. 2n = 30.


Phenology: Flowering (Jun–)Jul–Sep.
Habitat: Open areas, edges of forests
Elevation: 1600–2100(–2500) m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.
... more about "Hymenoxys vaseyi"
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Mark W. Bierner +
(A. Gray) Cockerell +
decurrent +
Actinella vaseyi +
hairy +  and glabrous +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Vasey’s rubberweed or bitterweed +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
N.Mex. +  and Tex. +
1600–2100(–2500) m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open areas, edges of forests +
discoid +  and radiate +
in paniculiform to corymbiform arrays +  and singly +
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 />) +
0.8 cm8 mm <br />0.008 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
unequal +  and subequal +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-carpellate +
persistent +
1.5 cm15 mm <br />0.015 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
Flowering (Jun–)Jul–Sep. +
28 +  and 50 +
Bull. Torrey Bot. Club +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid;conic;ovoid;hemispheric +
5 +  and 6 +
aristate +  and obovate +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
exalbuminous +
subequal;unequal +
Endemic +  and Conservation concern +
green throughout or sometimes purple-red-tinted +
1 +  and 10 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dugaldia +  and Plummera +
Hymenoxys vaseyi +
Hymenoxys +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
shrub +  and subshrub +