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linear-leaf discoid gumweed, Wyoming goldenbush

bighead goldenbush, goldenweed, heath goldenrod, shrubby goldenweed, single-head goldenweed, singlehead goldenbush

Habit Plants 10–40 cm. Plants 10–40 cm.
Stems

erect to spreading, green when young, becoming brown, branched proximally, densely floccose-tomentose, eglandular.

spreading to erect (bushes mostly broader than high), highly branched, green when young, becoming reddish brown, long-stipitate-glandular.

Leaves

ascending;

blades linear (adaxially sulcate), 10–30 × 1–2 mm, midnerves evident, apices acute, faces mostly densely tomentose, stipitate-glandular;

sometimes with axillary leaf fascicles.

ascending;

blades oblanceolate, 5–40 × 2–7 mm, midnerves evident, (margins crispate) apices acute, faces long-stipitate-glandular;

fascicles absent or of 1–3 leaves.

Peduncles

2–20 mm (usually leafy).

2–20(–40) mm (bracts 1–10+, leaflike).

Involucres

obconic, 9–11 × 6–9 mm.

campanulate, 9–15 × 10–15 mm.

Ray florets

0.

(0–)1–8;

laminae elliptic, 8–14 × 1.5–4 mm.

Disc florets

10–22;

corollas 9–11 mm.

15–40;

corollas 8.5–10.5 mm.

Phyllaries

20–30 in 2–3 series, green to tan, oblong to lanceolate, 5–10 × 0.8–1.5 mm, subequal, mostly chartaceous, outer herbaceous or herbaceous-tipped, midnerves usually evident, apices acute to acuminate, abaxial faces hairy, stipitate-glandular.

17–31 in 2–3 series, green to tan, lanceolate to obovate, 8–18 × 1–4 mm, subequal, outer herbaceous or herbaceous-tipped, inner chartaceous to herbaceous-tipped, midnerves (+ 2 smaller, collateral nerves) often evident, (margins herbaceous or narrowly membranous, mostly stipitate glandular to fimbriate) apices acute to acuminate, abaxial faces stipitate-glandular.

Heads

borne singly or in cymiform arrays.

borne singly or (2–3) in (leafy) racemiform arrays (1–4 cm wide).

Cypselae

brownish, narrowly oblong, 5–6 mm, densely hairy;

pappi tan, 8–10 mm.

narrowly turbinate to ellipsoid, 5.5–8 mm, villous;

pappi tan, 7.5–9 mm.

2n

= 18.

Ericameria linearis

Ericameria suffruticosa

Phenology Flowering late summer–fall. Flowering mid summer–fall.
Habitat Dry, stony slopes Rocky slopes and ridges in conifer forests and alpine zones
Elevation ca. 2300 m (ca. 7500 ft) 2100–3500 m (6900–11500 ft)
Distribution
from FNA
MT; WY
[BONAP county map]
from FNA
CA; ID; MT; NV; OR; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 20, p. 61. 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. discoidea, E. ericoides, E. fasciculata, E. gilmanii, E. greenei, E. laricifolia, E. lignumviridis, E. linearifolia, 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. resinosa, E. teretifolia, E. watsonii, E. winwardii, E. zionis
Synonyms Macronema lineare, E. discoidea var. linearis, Haplopappus macronema subsp. linearis, Haplopappus macronema var. linearis Macronema suffruticosa, Haplopappus suffruticosus
Name authority (Rydberg) R. P. Roberts & Urbatsch: Sida 21: 1560. (2005) (Nuttall) G. L. Nesom: Phytologia 68: 153. (1990)
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