Hymenoxys quinquesquamata

Rydberg in N. L. Britton et al.

in N. L. Britton et al., N. Amer. Fl. 34: 114. 1915.

Common names: Rincon rubberweed or bitterweed
Endemic
Treatment appears in FNA Volume 21. Treatment on page 441. Mentioned on page 437, 442.

Perennials, 30–100 cm (polycarpic; sometimes with sparingly branched, woody caudices). Stems 1 (–3), green throughout or purple-red-tinted proximally, branched distally, ± hairy. Leaves: blades simple or lobed (lobes 3–17), glabrous or sparsely hairy, glanddotted; mid leaves lobed (lobes 5–11, terminal lobes 0.8–2 mm wide). Heads 5–50+ per plant, in paniculiform to corymbiform arrays. Peduncles 2.5–7 cm, ± hairy. Involucres campanulate, 8–10 × 9–12 mm. Phyllaries in 2 series, unequal; outer 5 (–8), basally connate 1/3–1/2 their lengths, obovate to ovate, 6–7 mm, apices acuminate; inner 6–8, obovate, 6.5–8 mm, apices mucronate. Ray-florets 5–8; corollas yellow, 14–18 × 7–12 mm. Disc-florets 30–100+; corollas 3.5–4.3 mm. Cypselae obpyramidal, 2.5–3.9 mm; pappi of 5–6 obovate, sometimes aristate, scales 1.2–2.5 mm. 2n = 30.


Phenology: Flowering (Jun–)Jul–Sep(–Oct).
Habitat: Open areas, edges of pine-oak forests
Elevation: 1500–2500 m

Discussion

Hymenoxys quinquesquamata is known from southern Arizona, mostly Huachuca Mountains.

Selected References

None.

Lower Taxa

None.
... more about "Hymenoxys quinquesquamata"
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 +
Rydberg in N. L. Britton et al. +
decurrent +
hairy +  and glabrous +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
barbellulate +  and barbellate +
Rincon rubberweed or bitterweed +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
hairy +  and glabrous +
obpyramidal +
fertile +  and bisexual +
fertile +  and bisexual +
1500–2500 m +
hairy +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Open areas, edges of pine-oak 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 /> (1 cm10 mm <br />0.01 m <br />) +
campanulate +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +
dentate to pinnatifid or palmatifid +  and entire +
obovate +  and ovate +
unequal +  and subequal +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2-carpellate +
persistent +
aristate +
2.5 cm25 mm <br />0.025 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering (Jun–)Jul–Sep(–Oct). +
28 +  and 50 +
in N. L. Britton et al., N. Amer. Fl. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
conic;ovoid;conic;ovoid;hemispheric +
2 +  and 11 +
aristate +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
exalbuminous +
subequal;unequal +
1 (?) +  and 3 (?) +
green throughout or purple-red-tinted +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Dugaldia +  and Plummera +
Hymenoxys quinquesquamata +
Hymenoxys +
species +
urceolate +  and campanulate +
dilated +
toothed +  and entire +
6 (?) +  and 8 (?) +
0.65 cm6.5 mm <br />0.0065 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
shrub +  and subshrub +