7.二是形态形态shì生shēng理lǐ特tè性不bù同tóng,肾形xíng或huò马蹄形xíng,特征特征与yǔ花huā瓣互生shēng;花huā柱与yǔ花huā丝sī等děng长zhǎng ,积雪积雪雷léi公gōng根gēn竹节jié生shēng根gēn