Hieracium albiflorum

Hooker

Fl. Bor.-Amer. 1: 298. 1833. 1833

Illustrated
Synonyms: Chlorocrepis albiflora (Hooker) W. A. Weber
Treatment appears in FNA Volume 19. Treatment on page 292. Mentioned on page 281, 282.

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

V19-417-distribution-map.gif

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.

Lower Taxa

None.

... more about "Hieracium albiflorum"
John L. Strother +
Hooker +
Alta. +, B.C. +, N.W.T. +, Que. +, Sask. +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, S.Dak. +, Utah +, Wash. +, Wis. +, Wyo. +, Mexico (Chihuahua +  and Sonora). +
10–2900 m +
Chaparral, conifer forests, meadows, stream beds, serpentines, volcanics, around mineral springs +
Flowering (May–)Jun–Sep. +
Fl. Bor.-Amer. +
Illustrated +
Chlorocrepis albiflora +
Hieracium albiflorum +
Hieracium +
species +