Flora of North America species comparison

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Hieracium caespitosum

field hawkweed, King devil, meadow hawkweed, yellow hawkweed, yellow King-devil
Habit Plants 20–75 cm.
Stems

proximally piloso-hirsute (hairs 1–3+ mm) and stipitate-glandular, sometimes stellate-pubescent as well, distally piloso-hirsute (hairs 1–4+ mm), stellate-pubescent, and stipitate-glandular.
Leaves

basal 3–8+, cauline 0–2(–5+);

blades oblanceolate to lanceolate, 35–120(–180+) × 12–20+ mm, lengths 2–6(–10+) times widths, bases cuneate, margins entire or denticulate, apices rounded to acute, faces usually piloso-hirsute (hairs 1–3+ mm) and stellate-pubescent, sometimes glabrate.
Peduncles

piloso-hirsute (hairs 1–2.5 mm), stellate-pubescent, and stipitate-glandular.
Involucres

campanulate, 7.5–9 mm.
Florets

25–50+;

corollas yellow, 8–12+ mm.
Phyllaries

12–18+, apices acute to acuminate, abaxial faces piloso-hirsute (hairs 1–2.5+), stellate-pubescent, and stipitate-glandular.
Calyculi

bractlets 5–8+.
Heads

5–25+ in ± umbelliform or congested, corymbiform arrays.
Cypselae

columnar, 1.5–1.8 mm;

pappi of 25–30+, white bristles in 1 series, 4–5(–6) mm.

Hieracium caespitosum
Phenology Flowering May–Jul(–Aug).
Habitat Disturbed sites, stream sides
Elevation 10–300(–1500) m (0–1000(–4900) ft)
Distribution
from FNA
CT; DC; DE; GA; ID; IL; IN; KY; MA; MD; ME; MI; MN; MT; NC; NH; NJ; NY; OH; PA; RI; SC; TN; VA; VT; WA; WI; WV; WY; BC; MB; NB; NF; NS; ON; PE; QC; Europe [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
Discussion

The type of Hieracium floribundum Wimmer & Grabowski probably resulted from a cross between plants of H. caespitosum and H. lactucella (P. D. Sell and C. West 1976).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 284.
Parent taxa Asteraceae > tribe Cichorieae > Hieracium
Sibling taxa
H. abscissum, H. albiflorum, H. alpinum, H. argutum, H. aurantiacum, H. bolanderi, H. brevipilum, 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. venosum, H. vulgatum
Synonyms H. pratense, Pilosella caespitosa
Name authority Dumortier: Fl. Belg., 62. (1827)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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