Pyrrocoma racemosa
Pyrrocoma uniflora
cluster goldenweed, racemose pyrrocoma
one-flower goldenweed, plantain goldenweed, single head pyrrocoma
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.
1–7, curved-ascending to decumbent, red-tinged, sparsely leafy to almost naked, glabrate to lanate or tomentulose, eglandular.
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 linear to oblanceolate or elliptic, 40–150 × 3–20 mm, margins usually sharply dentate to laciniate, rarely entire;
cauline sessile, few, blades lanceolate, 20–50 × 2–6 mm, bases cordate, clasping;
faces glabrous, sparsely to densely shaggy-tomentose or lanate, eglandular.
0–2 cm.
2–12 cm.
hemispheric to campanulate, 5–15 × 5–18 mm.
hemispheric, 6–13 × 10–20 mm.
7–28;
corollas 5–12 mm.
18–50;
corollas 7–11 mm.
20–65;
corollas 5–8 mm.
35–60;
corollas 5–8 mm.
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 series, appresssed or loose, linear-lanceolate, 6–11 mm, subequal or unequal (sometimes outer ± shorter and green throughout), margins ciliate, faces usually villous to lanate, rarely glabrous.
(1–)3–15+ in spiciform, racemiform, or narrowly paniculiform arrays.
usually borne singly, sometimes 2–4 in racemiform arrays.
subcylindric, 2.5–5.5 mm, 4-angled, faces often sericeous or nearly glabrous;
pappi tawny, 6.5–8.5 mm.
subcylindric, 2–4 mm, obscurely nerved and angled, faces sericeous;
pappi tawny, 5–7 mm.
Pyrrocoma racemosa
Pyrrocoma uniflora
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.)
Varieties 2 (2 in the flora).
Pyrrocoma uniflora is recognized by its somewhat reduced habit, tomentose leaves and phyllaries, heads borne singly or in small racemes, and sericeous cypselae. It is probably most closely related to P. racemosa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Involucres 10–15 mm | → 2 |
1. Involucres 5–9 mm | → 3 |
2. Stems villous; basal leaf blades lanceolate; phyllaries densely villous | var. pinetorum |
2. Stems usually glabrous, rarely tomentulose; basal leaf blades oblanceolate to elliptic; phyllaries glabrous | var. racemosa |
3. Arrays narrowly paniculiform, racemiform, or spiciform, heads crowded only distally | var. paniculata |
3. Arrays usually glomerate-spiciform, heads crowded | → 4 |
4. Involucre 12–16 mm wide; phyllaries yellowish green, apices erect, faces sparsely tomentose at least proximally | var. congesta |
4. Involucre 5–7 mm wide; phyllaries with pale chartaceous bases, apices recurved, green, faces glabrous | var. sessiliflora |
1. Stems and leaves tufted-tomentose; involucres 10–13 mm; phyllaries loosely appressed, unequal | var. gossypina |
1. Stems and leaves tomentose to glabrate or glabrous; involucres 6–9 mm; phyllaries appressed, subequal | var. uniflora |
CA
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WildflowerSearch
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USDA Plants Database
