Ericameria nana |
Ericameria pinifolia |
|
---|---|---|
dwarf goldenbush, low goldenbush, rubber weed |
pine goldenweed, pine-bush |
|
Habit | Plants 5–50 cm. | Plants 50–300 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 ascending, green when young, fastigiately branched, glabrous, 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. |
ascending to spreading; blades linear to narrowly oblanceolate (terete or adaxially sulcate), 12–35 × 0.5–1.5 mm, midnerves obscure, apices acute, often mucronate, faces glabrous or moderately hairy, gland-dotted (in circular, deep pits), resinous; axillary fascicles of 4–10 leaves, shorter than subtending leaves. |
Peduncles | 0.2–5 mm (mostly ebracteate, glabrous). |
3–30 mm (leafy). |
Involucres | obconic, 5.5–7.5 × 2.5–4 mm. |
subcampanulate, 5–8 × 3.5–5.5 mm. |
Ray florets | 1–7; laminae elliptic, 3–4 × 0.8–1.3 mm. |
3–10; laminae 5.5–7 × 1.5–2 mm. |
Disc florets | 4–8; corollas 4.5–6.5 mm. |
11–25; corollas 5–8 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. |
20–26 in 4–6 series, tan, ovate to lanceolate or oblong, 3–7 × 1–1.8 mm, unequal, mostly chartaceous, outermost ± herbaceous-appendaged, midnerves thickened, darker resin ducts, slightly expanded apically, (margins membranous, fimbriate, especially distally) apices erect, acuminate to cuspidate, inner and mid acute to acuminate, abaxial faces usually glabrous, resinous. |
Heads | in congested, cymiform arrays (0.5–2.5 cm wide). |
in racemiform to thyrsiform-paniculiform arrays (to 30 × 3–12 cm). |
Cypselae | tan, narrowly oblanceoloid, 4–5.5 mm, glabrous or densely sericeous; pappi tan, 4–5.5 mm. |
tan to brown, subobovoid, 3.5–5 mm, glabrous or moderately hairy, more densely distally; pappi off-white to brown, 6–7.5 mm. |
2n | = 18. |
= 18. |
Ericameria nana |
Ericameria pinifolia |
|
Phenology | Flowering summer–fall. | Flowering late summer–fall(–spring). |
Habitat | Arid rocky plains, desert mountain cliffs, crevices | Open, sandy to stony soils in chaparral, oak woodland, or scrub in near coastal communities |
Elevation | 1300–2900 m (4300–9500 ft) | 100–1800 m (300–5900 ft) |
Distribution |
CA; ID; MT; NV; OR; UT
|
CA; Mexico (Baja California)
|
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.) |
Of conservation concern. Ericameria pinifolia ranges from Ventura County to northern Baja California. It blooms primarily in late summer and fall; it sometimes produces scattered, larger flowering heads in spring. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 61. | FNA vol. 20, p. 75. |
Parent taxa | Asteraceae > tribe Astereae > Ericameria | Asteraceae > tribe Astereae > Ericameria |
Sibling taxa | ||
Synonyms | Haplopappus nanus | Haplopappus pinifolius |
Name authority | Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 319. (1840) | (A. Gray) H. M. Hall: Univ. Calif. Publ. Bot. 3: 54. (1907) |
Web links |