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cultivated lettuce, garden lettuce

Habit Annuals or biennials, (15–)30–70(–100+) cm.

on proximal 1/2–3/4 of each stem;

blades of undivided cauline leaves ovate to orbiculate, margins entire or denticulate, seldom prickly, midribs rarely prickly-setose.


8–13+ mm.



corollas yellow (sometimes streaked with violet), usually deliquescent.


usually erect in fruit.


usually in corymbiform, sometimes in paniculiform, arrays.


bodies pale grayish to whitish or tan, ± flattened, obovate, 3–4 mm, beaks ± filiform, 3–5 mm, faces 5–9-nerved;

pappi white, 3.5–4+ mm.


= 18.

Lactuca sativa

Phenology Flowering mostly Jul–Sep.
Habitat Disturbed sites, abandoned plantings
Elevation 10–1000 m (0–3300 ft)
from FNA
AL; CA; CT; DC; DE; ID; IL; IN; MA; ME; MI; MO; NC; ND; NH; NJ; NM; NY; OH; OK; OR; PA; RI; VT; WA; WV; ON; Eurasia [Introduced in North America; introduced also in Mexico; introduced or ephemeral nearly worldwide]
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 263.
Parent taxa Asteraceae > tribe Cichorieae > Lactuca
Sibling taxa
L. biennis, L. canadensis, L. floridana, L. graminifolia, L. hirsuta, L. ludoviciana, L. saligna, L. serriola, L. virosa
Name authority Linnaeus: Sp. Pl. 2: 795. (1753)
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