Hymenoxys lemmonii |
Hymenoxys ambigens |
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alkali hymenoxys, Lemmon's bitterweed, Lemmon's goldflower, Lemmon's rubberweed, Lemmon's rubberweed or bitterweed |
Pinaleno Mountain rubberweed, Pinaleno Mountains rubberweed |
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Habit | Perennials, 30–50 cm (polycarpic; often with moderately branched, woody caudices). | Perennials, 30–150 cm (polycarpic, with sparingly branched, woody caudices). | ||||||||
Stems | 3–10(–15), green throughout or purple-red-tinted proximally, branched distally, glabrous or ± sparsely hairy. |
1–3, usually purple-red-tinted proximally, branched distally, glabrous or ± hairy. |
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Leaves | blades simple or lobed (lobes 3–13), glabrous or sparsely hairy, gland-dotted; mid leaves lobed (lobes 3–7, terminal lobes 1.5–2.3 mm wide). |
blades simple or lobed (lobes 3–19+), glabrous or sparsely hairy, gland-dotted; mid leaves lobed (lobes 3–19+, terminal lobes 0.7–1.3 mm wide). |
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Peduncles | (1–)2–4.5 cm, glabrous or ± hairy. |
0.4–2 cm, glabrous or ± hairy. |
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Involucres | subhemispheric to campanulate, 8–11 × 12–15 mm. |
campanulate to narrowly campanulate, 5–7.5 × 2.2–4.5 mm. |
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Ray florets | 9–12; corollas yellow, 10–16 × 4–6.5 mm. |
3–5; corollas yellow, extending beyond phyllaries, 3.4–6 × 1.7–4 mm. |
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Disc florets | 50–125+; corollas 3.5–4.2 mm. |
6–15 (functionally staminate); corollas 3–4 mm. |
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Phyllaries | in 2 series, unequal; outer 10–12, basally connate 1/4–1/2 their lengths (moderately to strongly keeled), ovate to lanceolate, 4.5–7 mm, apices acuminate to acute; inner 13–18(–28), obovate, 4–6 mm, apices usually mucronate. |
in 2 series, unequal; outer 3–5, basally connate 1/2–3/4 their lengths, obovate to oblanceolate, 4–6 mm, apices acuminate, acute, obtuse, or rounded; inner 3–5, obovate to oblanceolate, 2.5–4.5 mm, apices acuminate, acute, obtuse, or rounded, sometimes mucronate. |
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Heads | 10–85+ per plant, in paniculiform to corymbiform arrays. |
25–400+ per plant, in paniculiform to corymbiform arrays. |
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Cypselae | obpyramidal to narrowly obpyramidal, 2.5–3.5 mm; pappi of 5(–6) obovate, aristate scales (1.5–)2.1–2.8 mm. |
obconic, 1.7–3.5 mm (hairy, hairs straight or wavy); pappi 0, or of 2–6 ± lanceolate scales 1–2.5 mm. |
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2n | = 30. |
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Hymenoxys lemmonii |
Hymenoxys ambigens |
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Phenology | Flowering (Jun–)Jul–Aug(–Sep). | |||||||||
Habitat | Roadsides, open areas, meadows, on slopes, along drainages and streams | |||||||||
Elevation | (800–)1400–2200(–3200) m ((2600–)4600–7200(–10500) ft) | |||||||||
Distribution |
CA; NV; UT
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AZ; NM |
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Discussion | Varieties 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 443. | FNA vol. 21, p. 438. | ||||||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys | Asteraceae > tribe Heliantheae > subtribe Gaillardiinae > Hymenoxys | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Picradenia lemmonii | Plummera ambigens | ||||||||
Name authority | (Greene) Cockerell: Bull. Torrey Bot. Club 31: 477. (1904) | (S. F. Blake) Bierner: Sida 16: 6. (1994) | ||||||||
Web links |