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Erigeron melanocephalus
(A. Nels.) A. Nels.
Family:
Asteraceae
[
Erigeron uniflorus var. melanocephalus
A.Nelson]
Images
not available
Flora of North America
Resources
Guy L. Nesom in Flora of North America (vol. 20)
Perennials,
3-12(-21 at lower elevations) cm; fibrous-rooted, rhizomatous, caudices decumbent, often branched, rhizomelike, sometimes taprootlike.
Stems
erect, distally villous (hairs with black cross walls), minutely glandular near heads.
Leaves
mostly basal (persistent), some cauline; blades spatulate to oblanceolate, (10-)20-50(-150) × 4-6(-15) mm, cauline linear, bractlike, margins entire (apices rounded to retuse), faces glabrous or sparsely hirsute, eglandular.
Heads
1.
Involucres
6-9 × 10-14 mm.
Phyllaries
in 2(-3) series, sparsely villoso-sericeous (hairs flattened, cross walls black, imparting distinct black color to involucres), glandular.
Ray florets
45-74; corollas white to purple, 7-11 mm (mostly 1-2 mm wide), laminae spreading, tardily coiling.
Disc corollas
2.4-3.2 mm.
Cypselae
(oblanceoloid-oblong) 2-2.3 mm, 2-nerved, faces strigoso-hirsute;
pappi:
outer of setae, inner of 15-30 bristles.
2
n
= 18. Flowering Jul-Aug. Rocky slopes, talus, alpine and subalpine meadows, subalpine spruce-fir; 3100-4000 m; Colo., N.Mex., Utah, Wyo.
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