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hairy hawkweed, longbeard hawkweed

Canada hawkweed, narrow-leaf hawkweed, northern hawkweed, umbellate hawkweed

Habit Plants 30–75(–200) cm. Plants 15–60+ 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 and/or stellate-pubescent, distally usually glabrous, sometimes 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 0(–2), cauline (5–)8–15(–45+);

blades lance-elliptic to lanceolate, (20–)50–100(–150) × (10–)15–25(–40+) mm, lengths (3–)5–10+ times widths, bases cuneate to rounded or truncate (then sometimes ± clasping), margins usually toothed (to laciniate), denticulate, or entire (often ± revolute, at least distally), apices obtuse to acute, faces glabrous or ± stellate-pubescent, sometimes ± scabrellous (especially at or near distal margins).

Peduncles

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

usually stellate-pubescent.

Involucres

campanulate, 6–8(–10) mm.

campanulate to hemispheric, (8–)9–11+ mm.

Florets

30–40(–60);

corollas yellow, ca. 7 mm.

30–80+;

corollas yellow, 10–18 mm.

Phyllaries

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

12–21+, apices rounded to acute, abaxial faces usually glabrous, rarely piloso-hirsute and/or stipitate-glandular.

Calyculi

bractlets 9–13+.

bractlets 9–15+.

Heads

10–20+ in paniculiform to nearly racemiform arrays.

(1–)5–30(–100+) in corymbiform to subumbelliform arrays.

Cypselae

urceolate, 3–4+ mm;

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

columnar, 2.5–3.5 mm;

pappi of 50–60+, stramineous to sordid bristles in ± 2 series, 6–7 mm.

Hieracium longipilum

Hieracium umbellatum

Phenology Flowering Jul–Sep. Flowering (Jun–)Jul–Sep.
Habitat Fields, prairies, roadsides Disturbed sites (fields, roadsides), rocky slopes, openings in forests, prairies, thickets
Elevation 100–400 m (300–1300 ft) 600–3200 m (2000–10500 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
AK; CO; CT; IA; ID; IL; IN; MA; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NY; OH; OR; PA; RI; SD; VT; WA; WI; WV; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; SPM; Greenland; Europe; Asia
[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 circumscription of Hieracium umbellatum adopted here is supported by research done by others, especially G. A. Guppy (1978) and E. Lepage (1960). Hieracium canadense var. kalmii (Linnaeus) Scoggan, referable here, is an illegitimate name.

(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. paniculatum, H. parryi, H. pilosella, H. piloselloides, H. pringlei, H. robinsonii, H. sabaudum, H. scabrum, H. schultzii, H. scouleri, H. traillii, H. triste, H. venosum, H. vulgatum
Synonyms H. acranthophorum, H. canadense, H. canadense var. divaricatum, H. canadense var. fasciculatum, H. canadense var. hirtirameum, H. canadense var. subintegrum, H. columbianum, H. devoldii, H. ×dutillyanum, H. eugenii, H. kalmii, H. kalmii var. canadense, H. kalmii var. fasciculatum, H. musartutense, H. nepiocratum, H. rigorosum, H. scabriusculum, H. scabriusculum var. columbianum, H. scabriusculum var. perhirsutum, H. scabriusculum var. saximontanum, H. scabriusculum var. scabrum, H. stiptocaule, H. umbellatum subsp. canadense, H. umbellatum var. scabriusculum
Name authority Torrey ex Hooker: Fl. Bor.-Amer. 1: 298. (1833) Linnaeus: Sp. Pl. 2: 804. (1753)
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