Chrysothamnus greenei |
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Greene's rabbitbrush |
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Habit | Shrubs, 10–50 cm; with woody, moderately branched caudices, bark light gray, flaky to fibrous with age. |
Stems | ascending, green becoming tan, glabrous, resinous. |
Leaves | ascending to spreading; sessile; blades with faint midnerves, linear-filiform, 10–40 × 0.5–2 mm, flat or sulcate, sometimes twisted, margins glabrous or hirtellous, apices acute to apiculate, faces glabrous. |
Involucres | cylindric to turbinate, 5–8 × 1.5–2.5 mm. |
Disc florets | 4–5; corollas 3.7–5.5 mm, lobes 0.8–1.5 mm; style branches 2–2.4 mm (exserted beyond spreading corolla lobes), appendages 0.5–0.8 mm (shorter than stigmatic portion). |
Phyllaries | 15–20 in 3–4 series, often in vertical ranks or spirals, mostly tan, ± greenish apically, midveins rarely visible, ovate or oblong to elliptic, 1.5–5 × 0.8–1.4 mm, unequal, mostly chartaceous, sometimes ± keeled, apices acuminate to cuspidate (cusp often recurved or falcate), faces glabrous or with a few long, crooked hairs proximally and near margins, resinous. |
Heads | in densely cymiform arrays (4 cm wide), distal leaves reaching into but not overtopping arrays. |
Cypselae | reddish brown, turbinate, 3–4 mm, faces densely hairy; pappi tan, 3.7–5 mm. |
2n | = 18. |
Chrysothamnus greenei |
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Phenology | Flowering summer–fall. |
Habitat | Sandy washes, dry open places in desert |
Elevation | 1300–2000 m (4300–6600 ft) |
Distribution |
AZ; CA; CO; NM; NV; UT; WY
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Source | FNA vol. 20, p. 189. |
Parent taxa | Asteraceae > tribe Astereae > Chrysothamnus |
Sibling taxa | |
Synonyms | Bigelowia greenei |
Name authority | (A. Gray) Greene: Erythea 3: 94. (1895) |
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