板蓝根(Isatis tinctoria)为菘蓝的药用名称,又称蓝根。为十字花科大青属观赏兼药用植物。二年生草本,茎直立,株高40～100厘米,先端多分枝,单叶互生椭圆形,具叶柄,基部抱茎,全缘或具不明显锯齿,复总状花序,花小,4瓣,黄色,花期春季。耐寒、耐干旱,稍耐水湿、耐贫瘠,具明显春化作用。北方露地越冬,能大量自播,除可盆栽外,已辟为大环境绿地花被。板蓝根性大寒、味苦,具有清热解毒之功,为治 Isatis tinctoria is a medicinal name for Isatis, also known as Radix. For the crucifer is an ornamental and medicinal plants. Perennial herb, stems erect, height 40 to 100 cm, apex much branched, single leaf alternate elliptic, petiolate, basal amplex, entire or not serrulate, complex racemes, flowers small, 4 petals, yellow , Flowering in spring. Cold hardiness, drought resistance, a little water wet, resistant to poor, with significant vernalization. The northern open-air winter, a large number of self-broadcast, in addition to potted plants, has been turned into environmental green perianth. Banlangen big cold, bitter, with Qingrejiedu power, for the rule