Hieracium scouleri |
Hieracium venosum |
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hound-tongue hawkweed, hounds tongue hawkweed, hounds-tongue hawkweed (var. griseum), Scouler's hawkweed, Scouler's woollyweed, western hawkweed, western hawkweed (var. albertinum), woolly weed, woolly-weed (var. scouleri) |
rattlesnake hawkweed, rattlesnake weed |
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Habit | Plants (15–)35–60+ cm. | Plants ca. 45 cm. |
Stems | proximally usually piloso-hirsute (hairs 1–8+ mm) and stellate-pubescent, sometimes glabrous, distally usually piloso-hirsute (hairs 1–8+ mm) and stellate-pubescent, rarely stipitate-glandular as well, sometimes glabrous. |
proximally piloso-hirsute (hairs 1–3+ mm) to glabrate, distally usually glabrous, rarely piloso-hirsute. |
Leaves | basal 0(–5+), cauline (3–)5–10+; blades lanceolate, oblanceolate or narrowly oblong to elliptic, 50–100(–200) × 10–25(–35+) mm, lengths (3–)4–8+ times widths, bases cuneate, margins entire or denticulate, apices obtuse to acute, faces usually piloso-hirsute (hairs 1–5+ mm) and stellate-pubescent, rarely glabrous. |
basal 3–6+, cauline 0–1+; blades obovate or elliptic to oblanceolate, 40–60(–120) × 15–35(–50+) mm, lengths 2–3(–4) times widths, bases cuneate, margins usually entire, sometimes denticulate, apices rounded to acute, abaxial faces piloso-hirsute (hairs 2–5 mm) and stellate-pubescent, adaxial glabrous or piloso-hirsute (mostly near margins, hairs 2–3 mm). |
Peduncles | usually stellate-pubescent, sometimes piloso-hirsute and/or stipitate-glandular as well, rarely glabrous. |
usually stipitate-glandular, rarely glabrous or glabrate. |
Involucres | campanulate, 8–10 mm. |
obconic to campanulate, 7–9 mm. |
Florets | 20–45+; corollas yellow, 10–12 mm. |
30–45+; corollas yellow (sometimes pale), 7–11 mm. |
Phyllaries | 12–21+, apices rounded to acute, abaxial faces piloso-hirsute, stellate-pubescent, and stipitate-glandular. |
12–13+, apices acute, abaxial faces usually stellate-pubescent and stipitate-glandular, rarely glabrous. |
Calyculi | bractlets 5–13+. |
bractlets 6–10+. |
Heads | (3–)9–25+ in corymbiform to thyrsiform arrays. |
4–10(–20+) in corymbiform to paniculiform arrays. |
Cypselae | (red-brown or black) columnar, ca. 3 mm; pappi of 32–40+, white or stramineous bristles in ± 2 series, 6–7 mm. |
(usually black, sometimes red-brown) columnar, 3–4 mm; pappi of ca. 50+, stramineous bristles in ± 2 series, 4–5 mm. |
Hieracium scouleri |
Hieracium venosum |
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Phenology | Flowering Jun–Sep. | Flowering (Apr–)May–Jul(–Sep). |
Habitat | Disturbed sites, openings in pine forests and sagebrush, borders of meadows | Openings in forests, sandy hillsides |
Elevation | 400–3000 m (1300–9800 ft) | 10–300 m (0–1000 ft) |
Distribution |
CA; ID; MT; NV; OR; UT; WA; WY; AB; BC
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AL; CT; DC; DE; GA; IL; IN; KY; MA; MD; ME; MI; MO; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; VA; VT; WV; ON
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Discussion | Plants of Hieracium venosum with adaxial faces of leaf blades glabrous have been called var. nudicaule. The type of Hieracium marianum Willdenow may have resulted from a cross between plants of H. venosum and H. gronovii or H. scabrum (M. L. Fernald 1943c). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 19, p. 289. | FNA vol. 19, p. 292. |
Parent taxa | Asteraceae > tribe Cichorieae > Hieracium | Asteraceae > tribe Cichorieae > Hieracium |
Sibling taxa | ||
Synonyms | H. absonum, H. albertinum, H. chapacanum, H. cynoglossoides, H. scouleri var. albertinum, H. scouleri var. griseum | H. venosum var. nudicaule |
Name authority | Hooker: Fl. Bor.-Amer. 1: 298. (1833) | Linnaeus: Sp. Pl. 2: 800. (1753) |
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