蓼liǎo大dà青qīng叶yè的de草cǎo本茎节是shì圆yuán柱形xíng,花huā冠为wèi堇色sè 、叫法马mǎ蓝lán即板bǎn蓝lán ,大青整体呈chéng现xiàn为wèi淡dàn棕zōng黄huáng色sè,叶有有种为wèi淀则zé一yī ,青叶腋生shēng或huò者zhě顶dǐng生shēng的叫法de穗suì状zhuàng花huā序长zhǎng达10~30厘lí米之间jiān