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Hieracium alpinum
L.
Family:
Asteraceae
Alpine Hawkweed
FNA
Resources
John L. Strother in Flora of North America (vol. 19, 20 and 21)
Plants
10-15(-25+) cm.
Stems
proximally piloso-hirsute (hairs 3-5+ mm), stellate-pubescent, and stipitate-glandular, distally piloso-hirsute (hairs 3-5+ mm), stellate-pubescent, and stipitate-glandular.
Leaves:
basal 5-13+, cauline 0(-2+); blades spatulate to elliptic or narrowly lanceolate, 20-80 × 6-20+ mm, lengths 2-8+ times widths, bases cuneate, margins usually entire, rarely dentate, apices rounded to acute, faces piloso-hirsute (hairs 1-3+ mm).
Heads
borne singly or 2+ in corymbiform arrays.
Peduncles
piloso-hirsute, stellate-pubescent, and stipitate-glandular.
Calyculi:
bractlets 5-8+.
Involucres
± hemispheric, 13-18 mm.
Phyllaries
13-21+, apices acute to acuminate, abaxial faces piloso-hirsute and stipitate-glandular.
Florets
80-120+; corollas yellow, 12-15 mm.
Cypselae
columnar, 3.5-4 mm;
pappi
of 40-60+, stramineous bristles in ± 2 series, 6-7 mm.
Flowering Jul(-Sep). Calcareous stream banks; 0-10+ m; Greenland; Europe.
The type of
Hieracium trigonophorum
Oskarsson is probably conspecific with that of
H. alpinum
.
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This project made possible by
National Science Foundation Award 1410069
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