Ericameria cooperi |
Ericameria cooperi var. cooperi |
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Cooper's goldenbush |
Cooper goldenbush, Cooper's goldenbush |
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Habit | Plants 20–120 cm. | |
Stems | green when young, fastigiately branched, puberulent, gland-dotted (in pits), resinous. |
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Leaves | ascending to spreading; blades linear to narrowly obovate (terete to adaxially sulcate), (0.5–)10–15 × 0.5–1 mm, midnerves not evident, apices acute, faces puberulent, regularly gland-dotted (in circular, deep pits), resinous; axillary leaf fascicles present proximally, shorter than subtending leaves. |
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Peduncles | 5–15 mm (bracts 0–2). |
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Involucres | narrowly campanulate, 4–5 × 3–4 mm. |
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Ray florets | (0–)1–3; laminae elliptic, 4–6 × 1–2 mm. |
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Disc florets | 4–12; corollas 3–5 mm. |
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Phyllaries | 10–14 in 3–4 series, tan, sometimes greenish subapically, ovate to oblong, 2.5–5 × 0.6–1.5 mm, unequal, mostly chartaceous, midnerves evident, subapically expanded, (margins scarious or narrowly membranous, entire, ciliolate) apices erect, acute to obtuse, abaxial faces usually glabrous, sometimes (outer) sparsely puberulent and/or resinous. |
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Heads | in rounded, cymiform arrays (2–9 cm wide). |
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Cypselae | tan to brown, turbinate, 3–3.5 mm, sericeous; pappi silvery tan, 3–5 mm. |
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2n | = 18. |
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Ericameria cooperi |
Ericameria cooperi var. cooperi |
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Phenology | Flowering spring–early summer. | |
Habitat | Common in rocky desert basins, washes, desert slopes and mesas in creosote-scrub and Joshua tree woodlands | |
Elevation | 800–2000 m (2600–6600 ft) | |
Distribution |
CA; NV; nw Mexico
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CA; NV |
Discussion | Varieties 2 (1 in the flora). Ericameria cooperi var. bajacalifornica (Urbatsch & Wussow) Urbatsch is known only from Mexico (Baja California). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 20, p. 56. | FNA vol. 20, p. 56. |
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria > Ericameria cooperi |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Bigelowia cooperi, Haplopappus cooperi | |
Name authority | (A. Gray) H. M. Hall: Univ. Calif. Publ. Bot. 3: 56. (1907) | unknown |
Web links |