Flora of North America species comparison

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Lactuca hirsuta

hairy lettuce, tall hairy lettuce
Habit Biennials, 15–80(–120) cm.
Leaves

on proximal 1/3–2/3 of each stem;

blades of undivided cauline leaves ± ovate, margins denticulate (sometimes ± ciliate), midribs usually piloso-setose.
Involucres

12–18+ mm.
Florets

12–24+;

corollas usually yellow, sometimes drying bluish, usually deliquescent.
Phyllaries

usually reflexed in fruit.
Heads

in corymbiform to paniculiform arrays.
Cypselae

bodies brown, ± flattened, elliptic, 4.5–5+ mm, beaks ± filiform, 2.5–3.5 mm, faces 1(–3)-nerved;

pappi white, 6.5–8(–10+) mm.
2n

= 34.

Lactuca hirsuta
Phenology Flowering Jul–Aug(–Sep).
Habitat Openings in woods
Elevation 10–100 m (0–300 ft)
Distribution
from FNA
AL; AR; CT; DC; GA; IL; IN; KY; LA; MA; MD; ME; MI; MO; MS; NC; NH; NJ; NY; OH; PA; RI; SC; TN; TX; VA; VT; WV; NS; ON; PE; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

The type of Lactuca hirsuta may be conspecific with that of L. graminifolia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 262.
Parent taxa Asteraceae > tribe Cichorieae > Lactuca
Sibling taxa
L. biennis, L. canadensis, L. floridana, L. graminifolia, L. ludoviciana, L. saligna, L. sativa, L. serriola, L. virosa
Synonyms L. hirsuta var. albiflora, L. hirsuta var. sanguinea
Name authority Muhlenberg ex Nuttall: Gen. N. Amer. Pl. 2: 124. (1818)
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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