Ericameria teretifolia |
Ericameria palmeri |
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green or round-leaf rabbitbrush, green rabbitbrush, round-leaf rabbitbrush |
Palmer goldenweed, Palmer's goldenbush |
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Habit | Plants 30–150 cm. | Plants 50–400 cm. | ||||
Stems | erect to ascending, green when young, fastigiately branched, gland-dotted (in pits), resinous. |
erect, much branched, twigs crowded, green when young, becoming reddish brown to gray, glabrous or sparsely hairy, usually covered with resin-filled pits. |
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Leaves | mostly ascending to spreading; blades filiform (adaxially sulcate), 10–35 × 0.5–1.5 mm, midnerves obscure, apices acute to obtuse or rounded, faces glabrous, gland-dotted (in circular, deep pits), resinous. |
(moderately crowded) ascending to spreading; blades linear to narrowly oblanceolate (terete, sulcate, or flattened), 5–50 × 0.5–2 mm, midnerves obscure or evident abaxially, apices acute, faces glabrous or moderately hairy, gland-dotted (in circular, deep pits), resinous; axillary fascicles with 1–10 leaves, shorter than subtending leaves. |
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Peduncles | 0.5–2 mm (bracts 0–3, mostly like outer phyllaries). |
2–15 mm (bracts 5–10+, leaflike). |
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Involucres | obconic, 5–9 × 2–5 mm. |
turbinate to subcampanulate, 4–7 × 2.5–4 mm. |
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Ray florets | 0. |
2–8; laminae 4–5 × 1–1.8 mm. |
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Disc florets | 5–7; corollas 5.8–8 mm. |
6–20; corollas 5–7 mm. |
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Phyllaries | 16–20 in 3–5 series (in vertical ranks), tan, lanceolate to oblong, 1–7 × 0.5–1.5 mm, strongly unequal, mostly chartaceous, midnerves mostly obscure, apices acute to rounded (outer each tipped with subspheric resin-gland), abaxial faces resinous. |
16–24 in 3–5 series, mostly tan, narrowly oblong to elliptic, 1.5–6 × 0.4–0.8 mm, unequal, mostly chartaceous, midnerves evident on at least distal 1/2, slightly to strongly thickened, expanded distally, (margins narrowly membranous, sometimes ciliate distally) apices acute to rounded, abaxial faces glabrous, outer sometimes gland-dotted (sessile), frequently resinous. |
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Heads | in cymiform to racemiform arrays (1–3 cm wide). |
in racemiform to thyrsiform arrays (to 50 × 2–15 cm). |
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Cypselae | tan to brown, narrowly ellipsoid, 3–4 mm, sericeous; pappi off-white to brown, 6–7.5 mm. |
tan to brown, subcylindric, 3.5–4 mm, moderately to densely hairy; pappi off-white to brown, 5–8 mm. |
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2n | = 18. |
= 18. |
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Ericameria teretifolia |
Ericameria palmeri |
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Phenology | Flowering fall. | |||||
Habitat | Canyon walls, rocky flats, and slopes | |||||
Elevation | 600–2400 m (2000–7900 ft) | |||||
Distribution |
AZ; CA; NV
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CA; nw Mexico
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Discussion | Varieties 2 (2 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. 20, p. 76. | FNA vol. 20, p. 70. | ||||
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Linosyris teretifolia, Chrysothamnus teretifolius | Haplopappus palmeri | ||||
Name authority | (Durand & Hilgard) Jepson: Man. Fl. Pl. Calif., 1024. (1925) | (A. Gray) H. M. Hall: Univ. Calif. Publ. Bot. 3: 53. (1907) | ||||
Web links |