Pyrrocoma lanceolata |
Pyrrocoma racemosa |
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intermountain pyrrocoma, lance-leaf goldenweed |
cluster goldenweed, racemose pyrrocoma |
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Habit | Plants 20–50 cm. | Plants 20–75 cm. | ||||||||||||||||||||
Stems | 1–10, decumbent to ascending or erect, red-tinged, sometimes branched, sparsely leafy, ± tomentulose or glabrous, sometimes stipitate-glandular. |
2–5, erect or strongly ascending, brownish to red-tinged, bases often curved, sparsely to moderately leafy, usually glabrous, sometimes sparsely tomentulose or villous, eglandular. |
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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. |
basal (tufted) petiolate, blades lanceolate or oblanceolate to elliptic, 50–200(–300) × 4–30 mm, margins spinulose-serrate to entire or undulate, ciliate, apices acute, sometimes recurved; cauline sessile, blades lanceolate, 10–40 × 2–4 mm, reduced distally; faces usually glabrous, sometimes villous. |
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Peduncles | 0–6 cm. |
0–2 cm. |
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Involucres | hemispheric, 7–10 × 10–18 mm. |
hemispheric to campanulate, 5–15 × 5–18 mm. |
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Ray florets | 18–45; corollas 6–11 mm. |
7–28; corollas 5–12 mm. |
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Disc florets | 20–100; corollas 5–7 mm. |
20–65; corollas 5–8 mm. |
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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. |
in 4–5 series, lanceolate to oblanceolate or oblong, 6–13 mm, strongly unequal, margins sometimes ciliate, apices green, obtuse or acute, sometimes recurved, faces glabrous, sparsely tomentulose, or densely villous. |
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Heads | (1–)4–20(–50) in corymbiform or paniculiform arrays. |
(1–)3–15+ in spiciform, racemiform, or narrowly paniculiform arrays. |
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Cypselae | oblong, 3.5–4.5 mm, 4-angled, faces striate, sericeous; pappi tawny, 5–7 mm. |
subcylindric, 2.5–5.5 mm, 4-angled, faces often sericeous or nearly glabrous; pappi tawny, 6.5–8.5 mm. |
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Pyrrocoma lanceolata |
Pyrrocoma racemosa |
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Distribution |
CA; CO; ID; MT; ND; NE; NV; OR; TX; UT; WY; AB; SK
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CA; ID; NV; OR; UT
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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.) |
Varieties 5 (5 in the flora). Pyrrocoma racemosa is generally recognized by its erect stems, tufted leaves, and few to many heads in elongate, racemiform or spiciform arrays. It is the most variable species of Pyrrocoma, with numerous named varieties and subspecies. R. A. Mayes (1976) suggested that P. racemosa is closely related to the small-headed, racemiform species P. uniflora, P. apargioides, and P. lucida. The varieties are intergrading, making them somewhat difficult to identify. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 419. | FNA vol. 20, p. 421. | ||||||||||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Pyrrocoma | Asteraceae > tribe Astereae > Pyrrocoma | ||||||||||||||||||||
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Synonyms | Donia lanceolata, Haplopappus lanceolatus | Homopappus racemosus, Haplopappus racemosus | ||||||||||||||||||||
Name authority | (Hooker) Greene: Erythea 2: 69. (1894) | (Nuttall) Torrey & A. Gray: Fl. N. Amer. 2: 244. (1842) | ||||||||||||||||||||
Web links |