A genus of composite herbs, several of which are cultivated foe salad; lettuce.
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Lactuca, commonly known as lettuce, is a genus of flowering plants in the daisy family, Asteraceae. The genus includes at least 50 species, distributed worldwide, but mainly in temperate Eurasia.
Lactuca floridana, the woodland lettuce, is a North American species of wild lettuce. It is widespread across much of central Canada and the eastern and central United States from Ontario and Manitoba south as far as Texas, Louisiana, and Florida.
Lactuca virosa is a plant in the Lactuca (lettuce) genus, often ingested for its mild analgesic and sedative effects. It is related to common lettuce (L. sativa ), and is often called wild lettuce, bitter lettuce, laitue vireuse, opium lettuce, poisonous lettuce, tall lettuce, great lettuce or rakutu-karyumu-so.
Lactuca orientalis is a Eurasian species of plant in the dandelion tribe within the sunflower family. It is widespread across the Middle East and southern Asia as far east as Tibet.
Lactuca perennis, common names: mountain lettuce, blue lettuce or perennial lettuce, is a perennial herbaceous plant species belonging to the genus Lactuca of the daisy family. It is widespread across most of central and southern Europe. Its leaves are edible.
Lactuca saligna is a species of wild lettuce known by the common name willowleaf lettuce, and least lettuce. It is native to Eurasia but it grows in many other places as an introduced species, including much of North America.
Lactuca ludoviciana, the biannual lettuce, is a North American species of wild lettuce. It is widespread across much of central and western Canada and the western and central United States from Ontario west to British Columbia and south to Louisiana, Texas, and California. Most of the known populations are on the Great Plains; populations west of there may well represent naturalizations.
Lactuca tetrantha, the Troödos lettuce, is an erect, lactiferous, perennial herb, 10–30 cm high. Leaves hairless, deeply dissected, the basal in rosette, oblong, 3-12 x 0.8-2.5 cm, often purplish-green, the upper alternate, smaller. Flowers in capitula, arranged in corymbs, florets 4, ligulate, yellow, reddish at the lower surface, flowers July–October, fruit a pappose achene.
Lactuca cypria, Cyprus lettuce, is a biennial, erect herb with glandular, hairy stems and a globose rhizome. Leaves alternate, simple, the basal large, oblong, petiolate, 10-15 x 5–7 cm, pinnatisect with a suborbicular terminal lobe, the upper smaller, often with a profound purple colour at the lower surface. Flowers in heads, capitula in corymbs, florets pale yellow, all ligulate, flowers April–July, fruit a pappose achene.