Hymenoxys brachyactis

Wooton & Standley

Contr. U.S. Natl. Herb. 16: 192. 1913.

Common names: East view rubberweed tall bitterweed
Treatment appears in FNA Volume 21. Treatment on page 443. Mentioned on page 435, 436.

Biennials or perennials, 30–60 cm (monocarpic; sometimes with sparingly branched, woody caudices). Stems 1–4 (–8), green throughout, branched distally, glabrous or sparsely hairy. Leaves: blades simple or lobed (lobes 3–9), glabrous, glanddotted; mid leaves lobed (lobes 3–7, terminal lobes 0.8–1 mm wide). Heads (7–) 40–150 (–250) per plant, in paniculiform to corymbiform arrays. Peduncles 1.2–2 cm, glabrous or sparsely hairy. Involucres usually urceolate, sometimes campanulate, 6–8 × 5–6 mm. Phyllaries in 2 series, unequal; outer 8 (–9), basally connate 1/2 their lengths, lanceolate, 4–6 mm, apices acuminate to acute; inner 8 (–10), obovate, 4.5–5 mm, apices mucronate. Ray-florets 8 (–9); corollas yellow, 7–8.5 × 3–4 (–4.8) mm. Disc-florets 25–60+; corollas 3.1–4.2 mm. Cypselae narrowly obpyramidal, 2.1–2.5 mm; pappi of 5 (–7) obovate to lanceolate, aristate scales 2.5–3 mm.


Phenology: Flowering Jul–Sep.
Habitat: Roadsides, open areas, edges of pine forests
Elevation: 2000–2500 m

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Hymenoxys brachyactis"
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 +
Wooton & Standley +
decurrent +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
East view rubberweed +  and tall bitterweed +
0.4 cm4 mm <br />0.004 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.85 cm8.5 mm <br />0.0085 m <br />) +
0.31 cm3.1 mm <br />0.0031 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
2000–2500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, open areas, edges of pine 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 />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
campanulate;urceolate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
unequal +  and subequal +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-carpellate +
persistent +
hairy +  and glabrous +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Jul–Sep. +
28 +  and 50 +
Contr. U.S. Natl. Herb. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid;conic;ovoid;hemispheric +
aristate +, obovate +  and lanceolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
exalbuminous +
subequal;unequal +
4 (?) +  and 8 (?) +
1 +  and 4 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dugaldia +  and Plummera +
Hymenoxys brachyactis +
Hymenoxys +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
perennial +  and biennial +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
shrub +  and subshrub +