Flora of North America species comparison

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Ericameria discoidea

Ericameria resinosa

discoid goldenweed, rayless goldenbush, sharp-scale goldenweed, white-stem goldenbush

Columbia goldenweed, Columbian goldenbush, Columbian heath goldenweed
Habit Plants 10–40 cm. Plants 30–50 cm.
Stems

erect to spreading, abundantly branched, twigs green when young, concealed by whitish, pannose tomentum, sporadically stipitate-glandular.

erect to spreading, green when young, fastigiately branched, glabrous or sparsely hairy, resinous.
Leaves

ascending to spreading;

blades linear or oblong to oblanceolate (flat), 10–35 × 2–7 mm, midnerves evident (1–2 fainter, collateral nerves often present), (margins often undulate) apices acute to obtuse, usually apiculate, faces usually stipitate-glandular, resinous;

axillary fascicles absent.

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

3–15 mm (bracts 0–3, reduced, leaflike, whitish tomentose and usually stipitate-glandular).

1–10 mm (bracts 0–15+).
Involucres

obconic, 9–13 × 6–10 mm.

obconic, 5.5–8 × 3–5 mm.
Ray florets

0.

3–7;

laminae (white) 5.5–7 × 1.5–2 mm.
Disc florets

10–26;

corollas 9–11 mm.

10–15;

corollas (white) 6–8 mm.
Phyllaries

12–17 in 2–3 series, green to tan, lanceolate to oblong, 6–10 × 1–2 mm, subequal, outer herbaceous or distally so, inner mostly chartaceous, midnerves evident, (margins of outer often distally stipitate-glandular, of inner narrowly membranous, sometimes minutely ciliolate) apices acute to attenuate, abaxial faces stipitate-glandular.

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

borne singly or in cymiform to racemiform arrays.

in loose, cymiform arrays (1–4 cm wide).
Cypselae

brownish, narrowly oblong to narrowly ovoid, 5–6 mm, villous;

pappi tan, 8.5–11 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 discoidea

Ericameria resinosa
Phenology Flowering late summer–fall. Flowering late summer–fall.
Habitat Rocky, open or sparsely wooded slopes, often in coarse talus Rocky plains, steep hillsides, and cliff faces, often on basalt
Elevation 2500–3800 m (8200–12500 ft) 100–1000 m (300–3300 ft)
Distribution
from FNA
CA; CO; ID; MT; NV; OR; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
ID; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Ericameria discoidea is common in the Rocky Mountains.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 58. FNA vol. 20, p. 76.
Parent taxa Asteraceae > tribe Astereae > Ericameria Asteraceae > tribe Astereae > Ericameria
Sibling taxa
E. albida, E. arborescens, E. arizonica, E. bloomeri, E. brachylepis, E. cervina, E. compacta, E. cooperi, E. crispa, E. cuneata, 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. pinifolia, E. suffruticosa, E. teretifolia, E. watsonii, E. winwardii, E. zionis
Synonyms Macronema discoidea, Haplopappus macronema Haplopappus resinosus
Name authority (Nuttall) G. L. Nesom: Phytologia 68: 153. (1990) Nuttall: Trans. Amer. Philos. Soc., n. s. 7: 319. (1840)
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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