Flora of North America species comparison

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Ericameria albida

Ericameria pinifolia

white-flower rabbitbrush

pine goldenweed, pine-bush
Habit Plants 10–150 cm. Plants 50–300 cm.
Stems

erect to ascending, pale green when young, becoming whitish, fastigiately branched, glabrous, resinous at and distal to nodes.

erect to ascending, green when young, fastigiately branched, glabrous, resinous.
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.

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

usually less than 10 mm (ebracteate).

3–30 mm (leafy).
Involucres

turbinate, 6–10 × 2–4 mm.

subcampanulate, 5–8 × 3.5–5.5 mm.
Ray florets

0.

3–10;

laminae 5.5–7 × 1.5–2 mm.
Disc florets

5–7;

corollas 4.7–7 mm.

11–25;

corollas 5–8 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.

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 rounded, cymiform arrays (to 5 cm wide).

in racemiform to thyrsiform-paniculiform arrays (to 30 × 3–12 cm).
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.

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 albida

Ericameria pinifolia
Phenology Flowering late summer–fall. Flowering late summer–fall(–spring).
Habitat Dry, alkaline plains, sandy or silty soils Open, sandy to stony soils in chaparral, oak woodland, or scrub in near coastal communities
Elevation 300–1800 m (1000–5900 ft) 100–1800 m (300–5900 ft)
Distribution
from FNA
CA; NV; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Ericameria albida is common in the Great Basin region.

(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. 54. FNA vol. 20, p. 75.
Parent taxa Asteraceae > tribe Astereae > Ericameria Asteraceae > tribe Astereae > Ericameria
Sibling taxa
E. arborescens, E. arizonica, E. bloomeri, E. brachylepis, E. cervina, E. compacta, E. cooperi, E. crispa, E. cuneata, E. discoidea, E. ericoides, E. fasciculata, E. gilmanii, E. greenei, E. laricifolia, E. lignumviridis, E. linearifolia, E. linearis, E. nana, E. nauseosa, E. obovata, E. ophitidis, E. palmeri, E. paniculata, E. parishii, E. parryi, E. pinifolia, E. resinosa, E. suffruticosa, E. teretifolia, E. watsonii, E. winwardii, E. zionis
E. albida, E. arborescens, E. arizonica, E. bloomeri, E. brachylepis, E. cervina, E. compacta, E. cooperi, E. crispa, E. cuneata, E. discoidea, E. ericoides, E. fasciculata, E. gilmanii, E. greenei, E. laricifolia, E. lignumviridis, E. linearifolia, E. linearis, E. nana, E. nauseosa, E. obovata, E. ophitidis, E. palmeri, E. paniculata, E. parishii, E. parryi, E. resinosa, E. suffruticosa, E. teretifolia, E. watsonii, E. winwardii, E. zionis
Synonyms Bigelowia albida, Chrysothamnus albidus Haplopappus pinifolius
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: 54. (1907)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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