Hieracium flagellare |
Hieracium traillii |
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flagellate hawkweed, hawkweed, whip hawkweed |
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Habit | Plants 5–12(–20+) cm. | Plants 25–60+ cm. |
Stems | proximally piloso-hirsute (hairs 2–4+ mm) and stellate-pubescent, distally piloso-hirsute (hairs 1–4 mm), stellate-pubescent, and stipitate-glandular. |
proximally glabrous or stellate-pubescent, distally glabrous or stellate-pubescent. |
Leaves | basal 8–12+, cauline 0(–2+); blades spatulate to oblanceolate, 20–45(–130+) × 8–20(–25+) mm, lengths 2–3+ times widths, bases cuneate, margins entire, apices rounded to acute, abaxial faces piloso-hirsute (hairs 1–4+ mm) and stellate-pubescent, adaxial piloso-hirsute (hairs 1–4+ mm). |
basal 5–6+, cauline 0(–1+); blades oblanceolate to spatulate, 40–80 × 18–45+ mm, lengths 3–5+ times widths, bases cuneate, margins usually entire, apices rounded to obtuse, abaxial faces piloso-hirsute (hairs 1–3+ mm), adaxial glabrous. |
Peduncles | piloso-hirsute, stellate-pubescent, and stipitate-glandular. |
stellate-pubescent and stipitate-glandular. |
Involucres | hemispheric, (9–)12–13 mm. |
hemispheric to campanulate, 8–10 (× 6–9) mm. |
Florets | 90–120+; corollas yellow (often each with abaxial red stripe), 6–10+ mm. |
30–60+; corollas yellow, ca. 12 mm. |
Phyllaries | 30–40, apices acuminate, abaxial faces stellate-pubescent, sometimes, piloso-hirsute and stipitate-glandular as well. |
13–21+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well. |
Calyculi | bractlets 13–15+. |
bractlets 5–8+. |
Heads | 2–4+ in ± umbelliform to corymbiform arrays. |
8–12+ in corymbiform arrays. |
Cypselae | columnar, 1–2.5 mm; pappi of 25–40+, white bristles in 1 series, 4–5+ mm. |
(black or red-brown) columnar, 3–4 mm; pappi of ca. 40+, stramineous bristles in ± 2 series, 6–7 mm. |
Hieracium flagellare |
Hieracium traillii |
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Phenology | Flowering May. | Flowering Jun–Aug. |
Habitat | Disturbed sites, roadsides, forest edges | Shaley sites |
Elevation | 10–300(–600+) m (0–1000(–2000+) ft) | 1000–1300 m (3300–4300 ft) |
Distribution |
CT; IN; MA; ME; MI; NH; NY; OH; PA; VA; VT; BC; NB; NS; PE; QC; Europe [Introduced in North America]
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KY; MD; OH; PA; VA; WV |
Discussion | The type of Hieracium flagellare may have resulted from a cross between plants of H. caespitosum and H. pilosella (A. Cronquist 1980). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 19, p. 284. | FNA vol. 19, p. 293. |
Parent taxa | Asteraceae > tribe Cichorieae > Hieracium | Asteraceae > tribe Cichorieae > Hieracium |
Sibling taxa | ||
Synonyms | H. flagellare var. amauracron, H. flagellare var. cernuiforme, H. flagellare var. pilosius, Pilosella flagellaris | H. greenii |
Name authority | Willdenow: Enum. Pl., suppl.: 54. (1814) | Greene: Pittonia 4: 226. (1900) |
Web links |
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