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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

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

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
from FNA
CA; ID; MT; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
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
[WildflowerSearch map]
[BONAP county map]
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.)

Source FNA vol. 19, p. 289. FNA vol. 19, p. 292.
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. pilosella, H. piloselloides, H. pringlei, H. robinsonii, H. sabaudum, H. scabrum, H. schultzii, 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. umbellatum, H. vulgatum
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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