Pyrrocoma racemosa |
Pyrrocoma lucida |
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cluster goldenweed, racemose pyrrocoma |
sticky goldenweed, sticky pyrrocoma |
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Habit | Plants 20–75 cm. | Plants 20–75 cm. | ||||||||||||||||
Stems | 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. |
1–5, erect, glabrous, gland-dotted, resinous. |
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Leaves | 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. |
basal petiolate, blades lanceolate or oblanceolate, 50–250 × 7–30 mm, margins sharply serrate, ciliate, apices acute; cauline sessile, blades lanceolate, 30–100 × 5–15 mm; faces glabrous, gland-dotted. |
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Peduncles | 0–2 cm. |
0–1 cm. |
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Involucres | hemispheric to campanulate, 5–15 × 5–18 mm. |
campanulate, 9–14 × 6–13 mm. |
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Ray florets | 7–28; corollas 5–12 mm. |
12–20; corollas 7–13 mm. |
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Disc florets | 20–65; corollas 5–8 mm. |
25–40; corollas 6–10 mm. |
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Phyllaries | 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. |
in 2–3 series, loose, linear or lanceolate, 7–13 mm, unequal, bases chartaceous, margins entire, eciliate, apices green, acute to acuminate or caudate, faces glabrous, gland-dotted. |
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Heads | (1–)3–15+ in spiciform, racemiform, or narrowly paniculiform arrays. |
12–30 in crowded, glomerate, spiciform arrays. |
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Cypselae | subcylindric, 2.5–5.5 mm, 4-angled, faces often sericeous or nearly glabrous; pappi tawny, 6.5–8.5 mm. |
subcylindric, 2.5–4 mm, 4-angled, faces striate, silky; pappi tawny to brownish, 5–7.5 mm. |
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2n | = 24. |
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Pyrrocoma racemosa |
Pyrrocoma lucida |
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Phenology | Flowering Jul–Sep. | |||||||||||||||||
Habitat | Alkaline grassy flats, sagebrush scrub, openings in pine forests | |||||||||||||||||
Elevation | 700–1600 m (2300–5200 ft) | |||||||||||||||||
Distribution |
CA; ID; NV; OR; UT
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CA |
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Discussion | 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.) |
Pyrrocoma lucida is recognized by its gland-dotted, resinous herbage, small heads in glomerate-spiciform arrays, and acuminate-caudate phyllaries. This tetraploid species appears to be closely related to P. racemosa (R. A. Mayes 1976). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 421. | FNA vol. 20, p. 421. | ||||||||||||||||
Parent taxa | Asteraceae > tribe Astereae > Pyrrocoma | Asteraceae > tribe Astereae > Pyrrocoma | ||||||||||||||||
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Subordinate taxa | ||||||||||||||||||
Synonyms | Homopappus racemosus, Haplopappus racemosus | Haplopappus racemosus subsp. lucidus, Haplopappus lucidus | ||||||||||||||||
Name authority | (Nuttall) Torrey & A. Gray: Fl. N. Amer. 2: 244. (1842) | (D. D. Keck) Kartesz & Gandhi: Phytologia 71: 60. (1991) | ||||||||||||||||
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