Pyrrocoma crocea |
|||||
---|---|---|---|---|---|
curly-head goldenweed |
|||||
Habit | Plants (10–)18–80 cm. | ||||
Stems | 2–10, erect or ascending, pale or reddish, often stout, usually glabrous, often tomentose distally. |
||||
Leaves | 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. |
||||
Peduncles | 1–5 cm. |
||||
Involucres | hemispheric, 10–20 × 15–60 mm. |
||||
Ray florets | 30–90; corollas (bright yellow) 9–30 mm. |
||||
Disc florets | 100+; corollas 7–13 mm. |
||||
Phyllaries | 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. |
||||
Heads | usually borne singly, terminal, sometimes 2–6 (not subtended by leaflike bracts). |
||||
Cypselae | narrowly oblong, compressed, 5–8 mm, 4-angled, faces striate, glabrous; pappi tawny, 6–12 mm. |
||||
Pyrrocoma crocea |
|||||
Distribution |
AZ; CO; NM; UT; WY
|
||||
Discussion | 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.) |
||||
Key |
|
||||
Source | FNA vol. 20, p. 417. | ||||
Parent taxa | Asteraceae > tribe Astereae > Pyrrocoma | ||||
Sibling taxa | |||||
Subordinate taxa | |||||
Synonyms | Haplopappus croceus | ||||
Name authority | (A. Gray) Greene: Erythea 2: 69. (1894) | ||||
Web links |