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Lactuca tetrantha

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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.