Pyrrocoma crocea
Pyrrocoma racemosa
curly-head goldenweed
cluster goldenweed, racemose pyrrocoma
2–10, erect or ascending, pale or reddish, often stout, usually glabrous, often tomentose distally.
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.
basal petiolate, blades oblanceolate to spatulate or narrowly elliptic, 80–450 × 5–60 mm (firm, leathery, succulent), margins entire or undulate, eciliate, apices acute or obtuse, faces usually glabrous, rarely puberulent, eglandular;
cauline sessile, blades lanceolate, 10–120 × 5–30 mm, bases clasping.
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.
1–5 cm.
0–2 cm.
hemispheric, 10–20 × 15–60 mm.
hemispheric to campanulate, 5–15 × 5–18 mm.
30–90;
corollas (bright yellow) 9–30 mm.
7–28;
corollas 5–12 mm.
100+;
corollas 7–13 mm.
20–65;
corollas 5–8 mm.
in 2–3 series (loose), usually green, sometimes yellowish, oblong to spatulate, 9–15 mm, subequal, margins pale, entire or denticulate, eciliate, apices ± erect, obtuse, broad.
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.
usually borne singly, terminal, sometimes 2–6 (not subtended by leaflike bracts).
(1–)3–15+ in spiciform, racemiform, or narrowly paniculiform arrays.
narrowly oblong, compressed, 5–8 mm, 4-angled, faces striate, glabrous;
pappi tawny, 6–12 mm.
subcylindric, 2.5–5.5 mm, 4-angled, faces often sericeous or nearly glabrous;
pappi tawny, 6.5–8.5 mm.
Pyrrocoma crocea
Pyrrocoma racemosa
Varieties 2 (2 in the flora).
Pyrrocoma crocea is recognized by its thick stems, large, firm leaves, and large heads with oblong to spatulate phyllaries. H. M. Hall (1928) considered it the ancestral form of Pyrrocoma because of its large heads, numerous florets, long rays, and short style-branch appendages. R. A. Mayes (1976) suggested it is closely related to P. integrifolia.
(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.)
1. Plants 30–80 cm, robust; heads usually borne singly; involucres 15–20 × 20–40 mm; ray florets 13–30 mm | var. crocea |
1. Plants 10–30 cm, slender; heads usually 2–6, occasionally 1; involucres 10–15 × 15–20 mm; ray florets 9–12 mm | var. genuflexa |
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 |
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