Hymenoxys richardsonii var. floribunda

(A. Gray) K. F. Parker

Madroño 10: 159. 1950.

Common names: Colorado rubberweed olivaceous bitterweed
Endemic
Basionym: Actinella richardsonii var. floribunda A. Gray Mem. Amer. Acad. Arts, n. s. 4: 101. 1849
Treatment appears in FNA Volume 21. Treatment on page 441. Mentioned on page 435, 436.

Plants 19–34 cm. Stems (2–) 5–20 (–30+), glabrous or ± hairy. Leaves glabrous or sparsely hairy. Heads (30–) 80–250 (–300+) per plant. Involucres 7–8 × 7–9 mm. Phyllaries: outer 8–9, strongly keeled, obovate, ovate, or lanceolate, 3.5–6 mm, apices acute; inner 8–12, 3–5 mm. Ray-florets 7–9; corollas 7–11 mm. Disc-florets 25–50+; corollas 3–4 mm. Cypselae 2 mm; pappi of (4–) 5 obovate, aristate scales 1.8–2.8 mm. 2n = 30.


Phenology: Flowering (May–)Jul–Aug(–Oct).
Habitat: Roadsides, open areas, edges of forests
Elevation: (1600–)1800–2700(–3400) m

Distribution

V21-1104-distribution-map.gif

Ariz., Colo., N.Mex., Tex., Utah.

Discussion

Selected References

None.

Lower Taxa

None.
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
indeterminate +  and determinate +
Mark W. Bierner +
(A. Gray) K. F. Parker +
decurrent +
Actinella richardsonii var. floribunda +
hairy +  and glabrous +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Colorado rubberweed +  and olivaceous bitterweed +
0.7 cm7 mm <br />0.007 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, N.Mex. +, Tex. +  and Utah. +
(1600–)1800–2700(–3400) m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Roadsides, open areas, edges of forests +
discoid +  and radiate +
in paniculiform to corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
campanulate +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
hairy +  and glabrous +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
lanceolate +, ovate +, obovate +  and keeled +
unequal +  and subequal +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
2-carpellate +
persistent +
4 +  and 8 +
obovate +  and lanceolate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering (May–)Jul–Aug(–Oct). +
28 +  and 50 +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid;conic;ovoid;hemispheric +
aristate +  and obovate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
exalbuminous +
subequal;unequal +
purple-red-tinted +  and green +
5 +  and 20 +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dugaldia +  and Plummera +
Hymenoxys richardsonii var. floribunda +
Hymenoxys richardsonii +
variety +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +