wild lettuce

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Related to lactuca canadensis: Lactuca virosa

wild lettuce

n
(Plants) any of several uncultivated lettuce plants, such as Lactuca serriola (or L. scariola) of Eurasia and L. canadensis (horseweed) of North America, which grow as weeds and have yellow or blue flowers, milky juice in the stem, and prickly leaves: family Asteraceae (composites)
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References in periodicals archive ?
On Abandoned sites, indicator species consisted of plants one would expect to find in both upland forests and semi-open habitats, including false Solomon's seal (Maianthemum racemosum), yellow pimpernel (Lysimachia nemorum), and Canada lettuce (Lactuca canadensis) (USDA, 2015).
Lactuca canadensis occurs throughout the greater part of
Juncus torreyi Koeleria macrantha Kummerowia stipulacea * Lactuca canadensis Lactuca serriola * Lactuca sp.
Lactuca canadensis L.; Wild or Canada lettuce; Western old-field; Infrequent; C = 2; BSUH 18051.
1 Asteraceae Native Cony--a canadensis Asteraceae Native Erigeron annuus Asteraceae Native Lactuca canadensis Asteraceae Introduced Lactuca serriola Asteraceae Native Pyrrhopappus carolinianus Asteraceae Native Solidago canadensis Asteraceae Native Taraxacum officinale Brassicaceae Introduced Capsella burla pastoris Convolvulaceae Native Calystegia sepium Chenopodiaceae -- Chenopodium sp.