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mouse-ear hawkweed, épervière piloselle

hairy hawkweed, longbeard hawkweed

Habit Plants 10–25(–40+) cm. Plants 30–75(–200) cm.
Stems

proximally piloso-hirsute (hairs 1–3+ mm) and stellate-pubescent, distally piloso-hirsute (hairs 1–2 mm), stellate-pubescent, and stipitate-glandular.

proximally piloso-hirsute (hairs 6–15+ mm), distally piloso-hirsute (hairs 3–10+ mm), sometimes stellate-pubescent as well.

Leaves

basal (2–)5–10+, cauline 0(–3);

blades elliptic to ± oblanceolate, 10–45(–75+) × 5–12(–18+) mm, lengths 2–4(–6+) times widths, bases cuneate, margins entire, apices acute, faces piloso-hirsute (hairs 2–7+ mm) and stellate-pubescent.

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).

Peduncles

piloso-hirsute and stellate-pubescent.

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

Involucres

hemispheric to obconic, 7.5–9 mm.

campanulate, 6–8(–10) mm.

Florets

60–120+;

corollas yellow (often each with abaxial red stripe), 8–13+ mm.

30–40(–60);

corollas yellow, ca. 7 mm.

Phyllaries

20–34+, apices acuminate, abaxial faces stellate-pubescent and stipitate-glandular, sometimes piloso-hirsute as well.

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

Calyculi

bractlets 8–15+.

bractlets 9–13+.

Heads

usually borne singly, rarely 2(–3).

10–20+ in paniculiform to nearly racemiform arrays.

Cypselae

columnar, 1.5–2 mm;

pappi of 30+, white bristles in 1 series, 4–5 mm.

urceolate, 3–4+ mm;

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

Hieracium pilosella

Hieracium longipilum

Phenology Flowering May–Aug. Flowering Jul–Sep.
Habitat Disturbed sites (sandy or gravelly soils, fields, lawns, roadsides) Fields, prairies, roadsides
Elevation 10–100+ m (0–300+ ft) 100–400 m (300–1300 ft)
Distribution
from FNA
CT; DE; GA; KY; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; OR; PA; RI; TN; VA; VT; WA; WV; BC; NB; NF; NS; ON; QC; SPM; Europe [Introduced in North America]
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[BONAP county map]
from FNA
AR; IA; IL; IN; KS; KY; LA; MI; MN; MO; NE; OH; OK; TN; TX; WI; ON
[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. 283. FNA vol. 19, p. 285.
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. longipilum, H. megacephalon, H. murorum, H. nudicaule, H. paniculatum, H. parryi, 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. 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. pilosella var. niveum, Pilosella officinarum
Name authority Linnaeus: Sp. Pl. 2: 800. (1753) Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833)
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