Hieracium longipilum |
Hieracium paniculatum |
|
---|---|---|
hairy hawkweed, longbeard hawkweed |
Allegheny hawkweed, panicle hawkweed |
|
Habit | Plants 30–75(–200) cm. | Plants 30–90 cm. |
Stems | proximally piloso-hirsute (hairs 6–15+ mm), distally piloso-hirsute (hairs 3–10+ mm), sometimes stellate-pubescent as well. |
proximally usually glabrous, sometimes piloso-hirsute (hairs 3–8+ mm) and/or stellate-pubescent, distally usually glabrous. |
Leaves | basal 3–8+, cauline (3–)6–12+; blades oblanceolate, 45–80(–250+) × 12–30(–40+) mm, lengths 4–7+ times widths, bases cuneate, margins entire, apices rounded to acute, faces piloso-hirsute (hairs 3–8+ mm). |
basal 0(–2), cauline 6–12+; blades elliptic or oblanceolate to lanceolate, 30–80(–150) × 6–25(–35) mm, lengths 3–6+ times widths, bases cuneate, margins usually toothed, sometimes denticulate or entire, apices acute to acuminate, faces glabrous or piloso-hirsute (hairs 1–4+ mm). |
Peduncles | stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well. |
usually glabrous, sometimes stipitate-glandular. |
Involucres | campanulate, 6–8(–10) mm. |
campanulate to cylindric, 6–7 mm. |
Florets | 30–40(–60); corollas yellow, ca. 7 mm. |
8–20(–30); corollas ochroleucous to yellow, 5–8 mm. |
Phyllaries | 12–21+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular. |
8–13+, apices acute to acuminate, abaxial faces usually glabrous, sometimes stipitate-glandular. |
Calyculi | bractlets 9–13+. |
bractlets 8–13+. |
Heads | 10–20+ in paniculiform to nearly racemiform arrays. |
(6–)12–50+ in corymbiform to paniculiform arrays. |
Cypselae | urceolate, 3–4+ mm; pappi of 35–40+, stramineous to sordid bristles in 2+ series, 5.5–6.5 mm. |
columnar, 2–2.5 mm; pappi of 35–40+, stramineous bristles in ± 2 series, 4–5 mm. |
Hieracium longipilum |
Hieracium paniculatum |
|
Phenology | Flowering Jul–Sep. | Flowering (Jul–)Aug(–Oct). |
Habitat | Fields, prairies, roadsides | Openings in forests |
Elevation | 100–400 m (300–1300 ft) | (10–)500–800 m ((0–)1600–2600 ft) |
Distribution |
AR; IA; IL; IN; KS; KY; LA; MI; MN; MO; NE; OH; OK; TN; TX; WI; ON
|
AL; CT; DE; GA; IN; KY; MA; MD; ME; MI; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WV; NB; NS; ON; QC
|
Discussion | Hieracium longipilum may be no longer present in Quebec. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The type of Hieracium scribneri Small may have resulted from a cross between plants of H. paniculatum and H. venosum (A. Cronquist 1980). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 285. | FNA vol. 19, p. 287. |
Parent taxa | Asteraceae > tribe Cichorieae > Hieracium | Asteraceae > tribe Cichorieae > Hieracium |
Sibling taxa | ||
Name authority | Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833) | Linnaeus: Sp. Pl. 2: 802. (1753) |
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