Hymenoxys hoopesii |
Hymenoxys helenioides |
|
---|---|---|
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 |
AZ; CA; CO; ID; NM; NV; OR; UT; WY
|
AZ; CO; UT |
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 | ||
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) |
Web links |