Difference between revisions of "Hieracium albiflorum"
Fl. Bor.-Amer. 1: 298. 1833.
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|tribe=Asteraceae tribe Cichorieae | |tribe=Asteraceae tribe Cichorieae | ||
|genus=Hieracium | |genus=Hieracium | ||
Revision as of 15:11, 18 September 2019
Plants 15–40(–90) cm. Stems proximally usually piloso-hirsute (hairs 1–6+ mm), rarely glabrous, distally glabrous. Leaves: basal (0–)3–8+, cauline 1–5(–12+); blades oblanceolate, 40–100(–300) × 12–30(–60+) mm, lengths 3–5+ times widths, bases cuneate, margins usually entire, sometimes sinuately toothed, apices obtuse to acute, faces piloso-hirsute (hairs 1–6 mm), rarely glabrous. Heads (3–)12–50+ in corymbiform to paniculiform arrays. Peduncles usually glabrous, sometimes stipitate-glandular. Calyculi: bractlets 5–12+. Involucres ± campanulate, (7–)8–10(–11) mm. Phyllaries 8–13+, apices acuminate, abaxial faces piloso-hirsute (hairs 1–2+ mm), stellate-pubescent, and stipitate-glandular. Florets (6–)12–25+; corollas yellow, 9–10 mm. Cypselae columnar, 2.5–4 mm; pappi of 30–40+, stramineous bristles in ± 2 series, (4–)5–7 mm.
Phenology: Flowering (May–)Jun–Sep.
Habitat: Chaparral, conifer forests, meadows, stream beds, serpentines, volcanics, around mineral springs
Elevation: 10–2900 m
Distribution
Alta., B.C., N.W.T., Que., Sask., Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., S.Dak., Utah, Wash., Wis., Wyo., Mexico (Chihuahua, Sonora).
Discussion
Selected References
None.