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orange-sneezeweed, owl's claw, owl's-claws

intermountain rubberweed, intermountain rubberweed or bitterweed

Habit Perennials, 30–100 cm (polycarpic, often with blackish, stout rhizomes). Perennials, 20–50 cm (polycarpic; usually with moderately branched, woody caudices).
Stems

1–4, green throughout to often purple-red-tinted proximally to purple-red-tinted throughout, branched distally, glabrous or ± hairy.

1–5(–10+), green throughout or lightly purple-red-tinted proximally, branched distally, ± hairy.

Leaves

blades simple, glabrous or ± hairy, gland-dotted;

mid leaves simple.

blades simple or lobed (lobes 3), glabrous or sparsely hairy, gland-dotted (basal leaf bases sparsely, if at all, long-villous-woolly);

mid leaves usually lobed (lobes 3, terminal lobes 2–5.5 mm wide), sometimes simple.

Peduncles

3–16 cm, ± hairy, tomentose distally near involucres.

(2.5–)4–7.5 cm, ± hairy.

Involucres

hemispheric to broadly campanulate, 12–17 × 19–26 mm.

subhemispheric to hemispheric, 9–12 × 12–18 mm.

Ray florets

14–26;

corollas usually yellow-orange to orange, 21–45 × 4.2–8.5 mm.

10–16;

corollas yellow to yellow-orange, 17–31 × 5–11 mm.

Disc florets

100–325+;

corollas 4.2–5.4 mm.

50–150+;

corollas 3.5–5.5 mm.

Phyllaries

in 2 series, subequal;

outer 16–24, basally connate 1/4–1/3 their lengths, ovate to lanceolate, 11–16 mm, apices acute;

inner 20–26, obovate to elliptic, 7.5–8.5 mm, apices acuminate to acute.

in 2 series, unequal;

outer 10–15, basally connate 1/4–1/3 their lengths (weakly keeled), lanceolate, 7.5–11 mm, apices acuminate;

inner 13(–17), obovate, 5–8 mm, apices acuminate to mucronate.

Heads

1–12 per plant, in paniculiform to corymbiform arrays.

5–50+ per plant, in paniculiform to corymbiform arrays.

Cypselae

obpyramidal to narrowly obpyramidal, 3.5–4.5 mm;

pappi of 5–7 lanceolate to lanceolate-acuminate scales 2.9–4.1 mm.

narrowly obpyramidal, 2.5–3.5 mm;

pappi of 5–7 obovate to lanceolate, aristate scales 2.5–4 mm.

2n

= 30.

= 30.

Hymenoxys hoopesii

Hymenoxys helenioides

Phenology Flowering (May–)Jul–Aug(–Nov). Flowering Jun–Aug.
Habitat Mountain meadows, open forests, along streams Roadsides, open areas, edges of forests
Elevation 1500–3700 m (4900–12100 ft) 2200–3000 m (7200–9800 ft)
Distribution
from FNA
AZ; CA; CO; ID; NM; NV; OR; UT; WY
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; UT
[BONAP county map]
Source FNA vol. 21, p. 439. FNA vol. 21, p. 442.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys
Sibling taxa
H. ambigens, H. bigelovii, H. brachyactis, H. brandegeei, H. cooperi, H. grandiflora, H. helenioides, H. jamesii, H. lemmonii, H. odorata, H. quinquesquamata, H. richardsonii, H. rusbyi, H. subintegra, H. texana, H. vaseyi
H. ambigens, H. bigelovii, H. brachyactis, H. brandegeei, H. cooperi, H. grandiflora, H. hoopesii, H. jamesii, H. lemmonii, H. odorata, H. quinquesquamata, H. richardsonii, H. rusbyi, H. subintegra, H. texana, H. vaseyi
Synonyms Helenium hoopesii, Dugaldia hoopesii Picradenia helenioides
Name authority (A. Gray) Bierner: Sida 16: 6. (1994) (Rydberg) Cockerell: Bull. Torrey Bot. Club 31: 481. (1904)
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