油麦菜为菊科莴苣属能形成嫩茎的一年生、二年生草本植物。该品种根系浅,须根发达,抽薹后形成肉质茎。叶互生,披针形,色绿,叶面平展,叶缘锯状,外叶开展,新叶松散。头状花絮,花黄色,白花授粉。子房单室,瘦果,黑褐色,成熟时顶端具有伞状冠毛,易随风飞散。幼苗期对温度的适应性较强,其生长适宜温度为12～20℃,可 Lemca is an annual, biennial herb that forms young stems of asteraceae. The varieties of shallow roots, developed fibrous roots, bolting to form a succulent stem. Leaves alternate, lanceolate, color green, leaf flat, leaf margin saw-shaped, outside the leaf to carry out, the new leaf loose. Headlines, flowers yellow, white flowers pollination. Ovary single chamber, achenes, dark brown, mature with umbrella-shaped crest at the top, easy to fly with the wind. Seedling adaptability to temperature is strong, its growth suitable temperature is 12 ~ 20 ℃, can