Introduction of Lettuce Seeds
Annual or biennial herbs. The stems are thick and fleshy. Basal leaves are tufted, gradually decreasing upward, oblong and obovate, entire or curly; Cauline leaves alternate, elliptic or triangular-ovate, heart-shaped at the base, with stems. There are 15 florets on the head, most of which are arranged in corymbose panicles at the top of stems and branches; The tongue flower is yellow. Achenes are narrow or oblong, obovate, gray, and fleshy red or brown. Flowering and fruiting period may-July.