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Compilation
Chrysopsis cooperi

2 Images see all

Holotype of Chrysopsis cooperi A. Nelson [family ASTERACEAE]
Isotype of Chrysopsis cooperi A. Nelson [family ASTERACEAE]
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Name

Identification
Isotype of Chrysopsis cooperi A. Nelson [family ASTERACEAE ] (stored under name); Verified by J.C. Semple, 1997 Heterotheca pumila (Greene) Semple [family ASTERACEAE ] Verified by J.C. Semple, 1997
Related name
  • Heterotheca pumila
  • Chrysopsis cooperii
  • Heterotheca villosa
  • Chrysopsis cooperi
Common name
  • Alpine goldenaster, Flora of North America Vol. 20

Flora

Entry for Heterotheca pumila (Greene) Semple [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 20,
Names
Heterotheca pumila (Greene) Semple [family COMPOSITAE], Brittonia, 39: 383. 1987
Chrysopsis pumila Greene [family COMPOSITAE], Erythea, 2: 95. 1894
Chrysopsis alpicola Rydberg [family COMPOSITAE]
Chrysopsis alpicola var. glomerata A. Nelson [family COMPOSITAE]
Chrysopsis cooperi A. Nelson [family COMPOSITAE]
Treatment Author(s)
John C. Semple
Information
Perennials, (7–)12.5–30(–38) cm; taprooted. Stems 1–75+, decumbent to ascending or erect (sometimes reddish brown), moderately appressed-strigose, sparsely long-hirsute. Leaves: proximal cauline petiolate, blades narrowly oblanceolate, 25–56 × 4–9 mm, not stiff, bases attenuate, margins flat, entire, strigoso-ciliate, with a few, proximal, long-hispido-strigose cilia, faces ± densely strigose, sparsely stipitate-glandular; distal cauline sessile, linear-oblanceolate, little reduced to slightly longer distally, surpassing heads, margins entire, rarely slightly undulate, apices acute, faces moderately strigose, sparsely to moderately stipitate-glandular. Heads 1–9(–20), borne singly or in corymbiform arrays. Peduncles 2–10 mm, moderately strigoso-canescent, long-hispid hairs few, sparsely stipitate-glandular; bracts grading from leaves, reduced proximal to heads, those subtending heads usually 1–5, narrowly oblanceolate, (large) 6.5–15 × 0.9–2.5 mm, leaflike. Involucres cylindric to campanulate, (6.3–)7.6–12 mm. Phyllaries in 4–5 series, slightly reddish purple distally, lanceolate, unequal, margins scarious, faces moderately strigose, eglandular or sparsely stipitate-glandular. Ray florets 10–23; laminae (8–)10–15 × 1–2.5 mm. Disc florets (16–)24–60(–73); corollas barely ampliate, 4.6–7.1 mm, throats glabrous, lobes 0.5–1 mm, glabrate (hairs 0.1–0.25 mm). Cypselae monomorphic, obconic, compressed, 1.7–3 mm, ribs 7–11, faces sparsely to moderately strigose; pappi off-white, outer of linear scales 0.25–1 mm, inner of 35–45 bristles 4.7–7 mm, longest attenuate. 2n = 18, 36.
Phenology
jul-aug (summer), sep (fall)
Altitude range
2900–3800 m;
Distribution
USA Colo.USA UtahUSA Wyo.
Discussion
Heterotheca pumila grows in subalpine and alpine sites in Colorado, southeastern Utah (Lasalle Mountains), and southern Wyoming, where it is very rare. It is most similar to H. villosa var. minor, which in the range of sympatry has larger heads but smaller distal cauline leaves than are typically found in H. pumila. Reports of occurrence of H. pumila from Arizona and New Mexico are based on narrow-leaved plants of H. fulcrata var. amplifolia with small ovate-lanceolate bracts subtending the heads.

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