Ericameria nana |
Ericameria resinosa |
|
---|---|---|
dwarf goldenbush, low goldenbush, rubber weed |
Columbia goldenweed, Columbian goldenbush, Columbian heath goldenweed |
|
Habit | Plants 5–50 cm. | Plants 30–50 cm. |
Stems | erect to spreading or recurved, green when young, soon becoming tan to brown, then nearly black when older, highly branched, twigs glabrous, glandular, usually resinous. |
erect to spreading, green when young, fastigiately branched, glabrous or sparsely hairy, resinous. |
Leaves | ascending to spreading; blades usually elliptic to oblanceolate, occasionally spatulate, 10–15 × 0.5–1.5 mm, mostly adaxially sulcate, margins entire, midnerves usually obscure to weakly evident, apices acute, apiculate, faces glandular, sometimes irregularly gland-dotted (in shallow pits), resinous; axillary fascicles present, persistent. |
mostly ascending to spreading, often recurved distally; blades filiform to narrowly oblanceolate (adaxially sulcate), 10–25 × 0.5–1.5 mm, midnerves obscure, apices apiculate, faces glabrous, resinous (axillary fascicles usually present). |
Peduncles | 0.2–5 mm (mostly ebracteate, glabrous). |
1–10 mm (bracts 0–15+). |
Involucres | obconic, 5.5–7.5 × 2.5–4 mm. |
obconic, 5.5–8 × 3–5 mm. |
Ray florets | 1–7; laminae elliptic, 3–4 × 0.8–1.3 mm. |
3–7; laminae (white) 5.5–7 × 1.5–2 mm. |
Disc florets | 4–8; corollas 4.5–6.5 mm. |
10–15; corollas (white) 6–8 mm. |
Phyllaries | 22–30 in 4–5 series, mostly tan, lanceolate to elliptic, 2–6.5 × 0.5–1.2 mm, strongly unequal, outer sometimes herbaceous or herbaceous-tipped (body apices obtuse or truncate to retuse, appendages erect), midnerves not evident or slightly raised, slightly expanded subapically, (mostly margins narrowly membranous, entire) apices acute to acuminate or attenuate, mid often aristate to cuspidate, abaxial faces glabrous, resinous. |
22–34 in 4–5 series, green to tan, lanceolate to oblong, 1–6 × 0.5–1.5 mm, strongly unequal (sometimes outer subequal), mostly chartaceous, outer herbaceous or apically so (mid bodies often apically obtuse to notched, with subulate appendages), midnerves evident, (margins narrowly membranous, entire or serrulate, often ciliolate) apices acute to attenuate (outer often squarrose), abaxial faces glabrous, resinous. |
Heads | in congested, cymiform arrays (0.5–2.5 cm wide). |
in loose, cymiform arrays (1–4 cm wide). |
Cypselae | tan, narrowly oblanceoloid, 4–5.5 mm, glabrous or densely sericeous; pappi tan, 4–5.5 mm. |
tan to brown, narrowly turbinate, 4.5–5 mm, moderately to densely sericeous; pappi off-white to brown, 5.8–7.2 mm. |
2n | = 18. |
= 18. |
Ericameria nana |
Ericameria resinosa |
|
Phenology | Flowering summer–fall. | Flowering late summer–fall. |
Habitat | Arid rocky plains, desert mountain cliffs, crevices | Rocky plains, steep hillsides, and cliff faces, often on basalt |
Elevation | 1300–2900 m (4300–9500 ft) | 100–1000 m (300–3300 ft) |
Distribution |
CA; ID; MT; NV; OR; UT
|
ID; OR; WA
|
Discussion | Some populations of Ericameria nana exhibit extreme variation in leaf shape and in phyllary apex length and shape. Whether such variants represent distinct taxa remains to be tested. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 20, p. 61. | FNA vol. 20, p. 76. |
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria |
Sibling taxa | ||
Synonyms | Haplopappus nanus | Haplopappus resinosus |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 319. (1840) | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 319. (1840) |
Web links |