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hairy hawkweed, longbeard hawkweed

Habit Plants 30–75(–200) cm. Plants 40–75+ 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 3–6+ mm), distally glabrous or stellate-pubescent, sometimes piloso-hirsute (hairs 1–3+ mm) and stipitate-glandular as well.

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 3–12+, cauline (1–)3–6;

blades oblanceolate to lanceolate, 35–120(–200) × 10–25(–30+) mm, lengths 3–6+ times widths, bases cuneate to truncate (distal leaves), margins usually entire, sometimes denticulate or toothed, apices obtuse to acute, faces piloso-hirsute (hairs 2–3+ mm).

Peduncles

stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well.

piloso-hirsute (hairs 0.5–1+ mm), stellate-pubescent, and stipitate-glandular.

Involucres

campanulate, 6–8(–10) mm.

± campanulate, 6–8+ (× 4–5) mm.

Florets

30–40(–60);

corollas yellow, ca. 7 mm.

20–24+;

corollas yellow, 6–9 mm.

Phyllaries

12–21+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular.

13–18+, apices ± rounded, abaxial faces piloso-hirsute (hairs 0.5–1+ mm), stellate-pubescent, and stipitate-glandular.

Calyculi

bractlets 9–13+.

bractlets 3–8+.

Heads

10–20+ in paniculiform to nearly racemiform arrays.

(5–)12–30(–60+) in paniculiform arrays.

Cypselae

urceolate, 3–4+ mm;

pappi of 35–40+, stramineous to sordid bristles in 2+ series, 5.5–6.5 mm.

(usually black, sometimes red-brown) columnar, 2–3 mm;

pappi of 36–40+, white or stramineous bristles in ± 2 series, 3.5–5 mm.

Hieracium longipilum

Hieracium abscissum

Phenology Flowering Jul–Sep. Flowering Apr, Jul–Aug.
Habitat Fields, prairies, roadsides Disturbed sites, openings in pine, oak, and pine-oak forests
Elevation 100–400 m (300–1300 ft) 2000–2600 m (6600–8500 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
AZ; NM; Mexico; Central America
[BONAP county map]
Discussion

Hieracium longipilum may be no longer present in Quebec.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 19, p. 285. FNA vol. 19, p. 293.
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. 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. 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
Synonyms H. rusbyi
Name authority Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833) Lessing: Linnaea 5: 132. (1830)
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