Hieracium longipilum |
Hieracium umbellatum |
|
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hairy hawkweed, longbeard hawkweed |
Canada hawkweed, narrow-leaf hawkweed, northern hawkweed, umbellate hawkweed |
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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 |
AR; IA; IL; IN; KS; KY; LA; MI; MN; MO; NE; OH; OK; TN; TX; WI; ON
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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
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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 | ||
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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