Hieracium albiflorum
Fl. Bor.-Amer. 1: 298. 1833.
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), Mexico (Sonora)
Discussion
Selected References
None.
Lower Taxa
"fine" is not a number.