- Claytonia perfoliata, Miners Lettuce;Montia perfoliata Donn ex Willd Howell;Springbeauty;Montia perfoliata (Donn ex Willd) Howell;Miners lettuce
- Ixeris stolonifera, Creeping lettuce
- Lactuca biennis, Tall blue lettuce
- Lactuca canadensis, Canada lettuce
- Lactuca candensis, Canada lettuce
- Lactuca floridana, Woodland lettuce
- Lactuca graminifolia, Grassleaf lettuce
- Lactuca hirsuta, Hairy lettuce
- Lactuca hirsutus, Hairy lettuce
- Lactuca indica, Indian lettuce
- Lactuca ludoviciana, Biannual lettuce
- Lactuca perennis, Mountain Lettuce
- Lactuca saligna, Least Lettuce;Willowleaf lettuce
- Lactuca sativa, Garden Lettuce;Garden lettuce
| - Lactuca serriola, Compass Plant;Prickly Lettuce;Milk Thistle;Lactuca scariola L;Prickly lettuce;Wild Lettuce, Milk Lettuce, Milk Thistle, Compass Plant, Wild Opium, English Thistle, Weed Milk Thistle, Horse Thistle
- Lactuca tatarica, Blue Lettuce;Sonchus tataricus L;Blue lettuce
- Lactuca viminea, Pliant Lettuce
- Lactuca virosa, Great Lettuce;Bitter lettuce
- Launaea cornuta, Wild Lettuce
- Mycelis muralis, Wall Lettuce;Lactuca muralis (L) Gaertn;Prenanthes muralis L;Wall-lettuce;Prenanthes muralis;Lactuca muralis
- Ottelia alismoides, Stratiotes alismoides L;Damasonium indicum Willd;Damasonium alismoides L RBr;Ottelia indica Willd Planch ex Dalzell & Gibson;Duck-lettuce;Ducklettuce;Duck Lettuce
- Pistia stratiotes, Water Lettuce;Water-lettuce;Water lettuce;Water-Lettuce
- Podolepis robusta, Cattlemans Lettuce;Alpine Podolepis;Alpine podolepis;Podolepis longipedata var robusta Maiden & Betche;Podolepis acuminata var robusta Maiden & Betche JHWillis
- Prenanthes purpurea, Purple Lettuce
- Saxifraga micranthidifolia, Lettuceleaf saxifrage;Brook lettuce
- Sonchus oleraceus, Smooth Sow-thistle;Common sowthistle;Smooth Sow-Thistle;Common Sow-Thistle;Annual Sow-Thistle;Hares Lettuce;Colewort;Milk Thistle;Thistle Milkweed;Milky Tassel;Swinies
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