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hairy hawkweed, longbeard hawkweed

naked stem Scouler's hawkweed, naked-stem hawkweed, Scouler's woollyweed

Habit Plants 30–75(–200) cm. Plants (15–)20–30(–50+) 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 1–7+ mm) and/or stellate-pubescent, distally usually glabrous, sometimes piloso-hirsute (hairs 1–7+ mm) and/or stellate-pubescent.

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–)5–8, cauline 0–3(–5);

blades lanceolate to lance-elliptic, 50–120 × 6–18(–30) mm, lengths (3–)5–8+ times widths, bases cuneate, margins usually entire, sometimes denticulate, apices acute, faces usually piloso-hirsute (hairs 2–7+ mm) and stellate-pubescent, sometimes glabrous or glabrate.

Peduncles

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

± stellate-pubescent, sometimes stipitate-glandular as well.

Involucres

campanulate, 6–8(–10) mm.

± campanulate, 8–10+ (× 4–6) mm.

Florets

30–40(–60);

corollas yellow, ca. 7 mm.

20–40+;

corollas yellow, 8–10+ mm.

Phyllaries

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

8–13+, apices rounded to acute, abaxial faces piloso-hirsute (hairs 0.5–2+ mm), stellate-pubescent, and stipitate-glandular.

Calyculi

bractlets 9–13+.

bractlets 8–13+.

Heads

10–20+ in paniculiform to nearly racemiform arrays.

(2–)5–12+ in paniculiform to corymbiform or subumbelliform arrays.

Cypselae

urceolate, 3–4+ mm;

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

(black) columnar, 2.5–3 mm;

pappi of 40–60+, white or stramineous bristles in ± 2 series, 4–6 mm.

Hieracium longipilum

Hieracium nudicaule

Phenology Flowering Jul–Sep. Flowering Jun–Aug(–Sep).
Habitat Fields, prairies, roadsides Openings in chaparral, conifer forests
Elevation 100–400 m (300–1300 ft) 400–2300 m (1300–7500 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
CA; OR
[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.)

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. 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. 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. cynoglossoides var. nudicaule, H. scouleri var. nudicaule
Name authority Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833) (A. Gray) A. Heller: Muhlenbergia 2: 149. (1906)
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