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intermountain pyrrocoma, lance-leaf goldenweed

Habit Plants 20–50 cm.
Stems

1–10, decumbent to ascending or erect, red-tinged, sometimes branched, sparsely leafy, ± tomentulose or glabrous, sometimes stipitate-glandular.

Leaves

basal blades lanceolate or rarely oblanceolate to narrowly elliptic, 50–300 × 8–30 mm, margins sharply dentate, eciliate, apices acute, spinulose;

cauline sessile, lanceolate, bases clasping;

faces ± tomentulose to glabrate or glabrous, sometimes stipitate-glandular.

Peduncles

0–6 cm.

Involucres

hemispheric, 7–10 × 10–18 mm.

Ray florets

18–45;

corollas 6–11 mm.

Disc florets

20–100;

corollas 5–7 mm.

Phyllaries

in 3–4 series, linear-lanceolate to lanceolate, 3–11 mm, unequal, bases white-chartaceous, margins entire, eciliate, apices conspicuously green, faces glabrous or tomentulose, rarely stipitate-glandular.

Heads

(1–)4–20(–50) in corymbiform or paniculiform arrays.

Cypselae

oblong, 3.5–4.5 mm, 4-angled, faces striate, sericeous;

pappi tawny, 5–7 mm.

Pyrrocoma lanceolata

Distribution
from FNA
CA; CO; ID; MT; ND; NE; NV; OR; TX; UT; WY; AB; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

Pyrrocoma lanceolata has the widest range of any species and exhibits much variability in habit and head size. A number of infraspecific taxa have been recognized in the past; only two were retained by R. A. Mayes (1976).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Stems glabrous or sparsely tomentulose, eglandular
var. lanceolata
1. Stems tomentulose, densely stipitate-glandular, especially peduncles
var. subviscosa
Source FNA vol. 20, p. 419.
Parent taxa Asteraceae > tribe Astereae > Pyrrocoma
Sibling taxa
P. apargioides, P. carthamoides, P. clementis, P. crocea, P. hirta, P. insecticruris, P. integrifolia, P. liatriformis, P. linearis, P. lucida, P. racemosa, P. radiata, P. uniflora
Subordinate taxa
P. lanceolata var. lanceolata, P. lanceolata var. subviscosa
Synonyms Donia lanceolata, Haplopappus lanceolatus
Name authority (Hooker) Greene: Erythea 2: 69. (1894)
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