Ericameria albida |
Ericameria cooperi |
|
---|---|---|
white-flower rabbitbrush |
Cooper's goldenbush |
|
Habit | Plants 10–150 cm. | |
Stems | erect to ascending, pale green when young, becoming whitish, fastigiately branched, glabrous, resinous at and distal to nodes. |
|
Leaves | usually ascending, recurved when older; blades filiform (adaxially sulcate), 15–35 × 0.5–2 mm, midnerves obscure, apices acute, often mucronate, faces glabrous, gland-dotted (in pits and sessile); axillary leaf fascicles often present. |
|
Peduncles | usually less than 10 mm (ebracteate). |
|
Involucres | turbinate, 6–10 × 2–4 mm. |
|
Ray florets | 0. |
|
Disc florets | 5–7; corollas 4.7–7 mm. |
|
Phyllaries | 15–20 in 3–4 series, green to tan, ovate to lanceolate, 1.5–6 × 0.7–1.5 mm, unequal, outer herbaceous or herbaceous-tipped, inner mostly chartaceous (bodies truncate or tapering gradually or abruptly to bases of herbaceous appendages), midnerves faint (margins membranous, usually ciliate), apices (outer and mid) cuspidate (tips squarrose), abaxial faces glabrous, resinous. |
|
Heads | in rounded, cymiform arrays (to 5 cm wide). |
|
Cypselae | tan, narrowly turbinate to subcylindric or narrowly ellipsoid, 4–5 mm (5-ribbed), moderately hairy to sericeous, often gland-dotted (glands spheric, glistening) distally; pappi whitish, 4.5–5.5 mm. |
|
2n | = 18. |
|
Ericameria albida |
Ericameria cooperi |
|
Phenology | Flowering late summer–fall. | |
Habitat | Dry, alkaline plains, sandy or silty soils | |
Elevation | 300–1800 m (1000–5900 ft) | |
Distribution |
CA; NV; UT
|
CA; NV; nw Mexico
|
Discussion | Ericameria albida is common in the Great Basin region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 20, p. 54. | FNA vol. 20, p. 56. |
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Bigelowia albida, Chrysothamnus albidus | Bigelowia cooperi, Haplopappus cooperi |
Name authority | (M. E. Jones ex A. Gray) L. C. Anderson: Great Basin Naturalist 55: 86. (1995) | (A. Gray) H. M. Hall: Univ. Calif. Publ. Bot. 3: 56. (1907) |
Web links |