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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
from FNA
AR; IA; IL; IN; KS; KY; LA; MI; MN; MO; NE; OH; OK; TN; TX; WI; ON
[WildflowerSearch map]
[BONAP county map]
from FNA
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
[WildflowerSearch map]
[BONAP county map]
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
H. abscissum, H. albiflorum, H. alpinum, H. argutum, H. aurantiacum, H. bolanderi, H. brevipilum, H. caespitosum, H. carneum, H. crepidispermum, H. fendleri, H. flagellare, H. greenei, H. gronovii, H. horridum, H. lactucella, H. longiberbe, H. megacephalon, H. murorum, H. nudicaule, H. paniculatum, H. parryi, H. pilosella, H. piloselloides, H. pringlei, H. robinsonii, H. sabaudum, H. scabrum, H. schultzii, H. scouleri, H. traillii, H. triste, H. umbellatum, H. venosum, H. vulgatum
H. abscissum, H. albiflorum, H. alpinum, H. argutum, H. aurantiacum, H. bolanderi, H. brevipilum, H. caespitosum, H. carneum, H. crepidispermum, H. fendleri, H. flagellare, H. greenei, H. gronovii, H. horridum, H. lactucella, H. longiberbe, H. longipilum, H. megacephalon, H. murorum, H. nudicaule, H. parryi, H. pilosella, H. piloselloides, H. pringlei, H. robinsonii, H. sabaudum, H. scabrum, H. schultzii, H. scouleri, H. traillii, H. triste, H. umbellatum, H. venosum, H. vulgatum
Name authority Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833) Linnaeus: Sp. Pl. 2: 802. (1753)
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