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Family	Scientific Name	Common Name	Habitat	Distribution	Image
Asteraceae	Lactuca biennis	Tall Blue Lettuce, Blue Wood Lettuce	Pastures, roadsides, forest edges, thickets.	NL (Labrador) and AK south to NC, TN, IA, CO, UT, and CA.
Asteraceae	Lactuca canadensis	American Wild Lettuce	Fields, roadsides, disturbed ground.	NS and BC south to n. peninsular FL, TX, and CA.
Asteraceae	Lactuca floridana	Woodland Lettuce	Mesic and dry-mesic forests.	NY, MB and MN south to s. FL and TX.
Asteraceae	Lactuca graminifolia var. graminifolia	Coastal Plain Lettuce	Mesic to dry-mesic pine-oak woodlands and forests, longleaf pine sandhills, sandy fields, and sandy roadsides.	E. NC south to s. FL, west to c. LA; disjunct in s. NJ.
Asteraceae	Lactuca hirsuta	Red Wood Lettuce	Dry, sandy or rocky woodlands, forest edges.	NS and ON south to s. GA and e. TX.
Asteraceae	Lactuca ludoviciana	Louisiana Lettuce	Fields, roadsides, mesic forests.	MB and BC, south to IN, KY, LA, TX, and CA.
Asteraceae	Lactuca saligna	Willowleaf Lettuce	Fields, roadsides, disturbed ground, perhaps associated with circumneutral soils.	Native of Europe.
Asteraceae	Lactuca sativa	Garden Lettuce	Cultivated throughout our area in home gardens and commercially, rarely weakly persistent, common as a cultivated plant, rare as a short-lived waif.	Native of w. Asia.
Asteraceae	Lactuca serriola	Prickly Lettuce	Roadsides, disturbed ground, pastures.	Native of Eurasia.
Asteraceae	Lactuca virosa	Bitter Lettuce	Disturbed areas.	Native of Europe. Reported for DC and AL (Kartesz 1999; Kartesz 2015; FNA19); no specimens have been seen that document this distribution.