Pyrrocoma crocea

(A. Gray) Greene

Erythea 2: 69. 1894.

Common names: Curly-head goldenweed
IllustratedEndemic
Basionym: Haplopappus croceus A. Gray Proc. Acad. Nat. Sci. Philadelphia 15: 65. 1864 (as Aplopappus)
Treatment appears in FNA Volume 20. Treatment on page 417. Mentioned on page 414, 416, 419.

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. Heads usually borne singly, terminal, sometimes 2–6 (not subtended by leaflike bracts). Peduncles 1–5 cm. Involucres hemispheric, 10–20 × 15–60 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. Ray-florets 30–90; corollas (bright-yellow) 9–30 mm. Disc-florets 100+; corollas 7–13 mm. Cypselae narrowly oblong, compressed, 5–8 mm, 4-angled, faces striate, glabrous; pappi tawny, 6–12 mm.

Distribution

V20-955-distribution-map.gif

Ariz., Colo., N.Mex., Utah, Wyo.

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.

Selected References

None.

Key

1 Plants 30–80 cm, robust; heads usually borne singly; involucres 15–20 × 20–40 mm; ray florets 13–30 mm Pyrrocoma crocea 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 Pyrrocoma crocea var. genuflexa

"[" is not declared as a valid unit of measurement for this property."[" is not declared as a valid unit of measurement for this property.

... more about "Pyrrocoma crocea"
not tailed +, rounded +  and obtuse +
distinct +
obtuse;obtuse;acute +
subequal +
scarious +
usually triangular +  and linear +
usually deltate +  and lanceolate +
corymbiform +, loose +, spiciform +  and racemiform +
indeterminate +  and determinate +
David J. Bogler +
(A. Gray) Greene +
oblanceolate +
serrate or shallowly laciniate +, spinulose-dentate +  and entire +
linear +  and elliptic +
attenuate +
3mm;30mm +
Haplopappus croceus +
compound +  and simple +
1 cm10 mm <br />0.01 m <br /> (12 cm120 mm <br />0.12 m <br />) +
lanceolate;oblanceolate;spatulate or narrowly elliptic +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
rugulose +  and muricate +
barbellulate +  and barbellate +
Curly-head goldenweed +
not 2-lipped +  and actinomorphic +
0.7 cm7 mm <br />0.007 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
4-angled +, compressed +  and oblong +
fertile +  and bisexual +
fertile +  and bisexual +
Ariz. +, Colo. +, N.Mex. +, Utah +  and Wyo. +
glabrous +  and puberulent +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
discoid +  and disciform +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
hemispheric +
1.5 cm15 mm <br />0.015 m <br /> (6 cm60 mm <br />0.06 m <br />) +
sessile +  and petiolate +
cauline +  and basal +
deltate +
spinulose-dentate +  and entire +
linear +  and elliptic +
denticulate +, entire +  and undulate +
3mm +  and 30mm +
2-carpellate +
persistent +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
yellowish +  and green +
appressed +  and loosely spreading +
oblong +  and spatulate +
0.9 cm9 mm <br />0.009 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
bearing subulate enations +, hairy +  and bristly +
exalbuminous +
Illustrated +  and Endemic +
reddish +  and pale +
ascending +  and erect +
tomentose +  and glabrous +
2 +  and 10 +
appendaged +  and truncate +
papillate +  and smooth +
Haplopappus sect. Pyrrocoma +
Pyrrocoma crocea +
Pyrrocoma +
species +
tubular-funnelform +
50 cm500 mm <br />0.5 m <br /> (90 cm900 mm <br />0.9 m <br />) +
stipitate-glandular +, glabrous +, tomentose +  and sericeous +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
10 cm100 mm <br />0.1 m <br /> (18 cm180 mm <br />0.18 m <br />) +