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Watson's goldenbush

Cooper's goldenbush

Habit Plants 5–40 cm.
Stems

erect to spreading (close to the ground), green when young, becoming pale reddish brown, highly branched, coarsely long-stipitate-glandular.

Leaves

(crowded) ascending;

blades elliptic to oblanceolate, 10–25 × 3–8 mm, midnerves evident (1–2 fainter, collateral nerves often present), (margins undulate) apices acute, apiculate, faces long-stipitate-glandular;

fascicles usually absent, (sometimes of 1–3 reduced leaves).

Peduncles

1–12 mm (bracts 3–20, crowded, leafy, grading into phyllaries).

Involucres

broadly obconic, 6–8 × 4–7 mm.

Ray florets

4–8;

laminae elliptic, 6–9 × 1–2 mm.

Disc florets

12–22;

corollas 5.5–6.5 mm.

Phyllaries

25–30 in 3–4 series, green to tan, ovate to oblong, 4–8 × 0.7–1.5 mm, unequal, outer herbaceous or with herbaceous appendages, inner mostly chartaceous, midnerves usually evident, (margins entire, outer often herbaceous, inner scarious) apices acute to acuminate or attenuate, abaxial faces mostly stipitate-glandular.

Heads

usually in cymiform arrays.

Cypselae

tan to brown, narrowly turbinate, 3–4.5 mm (usually 5-ribbed), moderately sericeous;

pappi tan, 4–5.5 mm.

2n

= 18.

Ericameria watsonii

Ericameria cooperi

Phenology Flowering late summer–fall.
Habitat Rock outcrops, desert scrub, pinyon-juniper, ponderosa pine communities
Elevation 1300–3400 m (4300–11200 ft)
Distribution
from FNA
AZ; NV; UT
[BONAP county map]
from FNA
CA; NV; nw Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

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. 77. FNA vol. 20, p. 56.
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. 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. winwardii, E. zionis
E. albida, E. arborescens, E. arizonica, E. bloomeri, E. brachylepis, E. cervina, E. compacta, 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
Subordinate taxa
E. cooperi var. cooperi
Synonyms Haplopappus watsonii Bigelowia cooperi, Haplopappus cooperi
Name authority (A. Gray) G. L. Nesom: Phytologia 68: 152. (1990) (A. Gray) H. M. Hall: Univ. Calif. Publ. Bot. 3: 56. (1907)
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