一、形態(tài)特征
株高14—30cm,根莖細(xì)長,匍匐平臥有節(jié),節(jié)上有白色鱗片,須根多且較堅(jiān)韌,微黃色,先端或中部常膨大為肉質(zhì)塊根,呈紡錘形,長圓形或卵形。葉叢生,狹線形,長15—30、cm,寬1—4mm,先端尖,基部綠白色并稍擴(kuò)大,花莛從葉叢中抽出,比葉短,長6.5—14cm,總狀花序,長3—8cm,每苞片內(nèi)著生1—3朵花,花梗長4—6mm,花被6片,花淡紫色,偶有白色,小型;雄蕊6;雌蕊1枚,子房半下位,3室。果實(shí)為球形,漿果狀,綠色,徑約5—7mm,熟時(shí)為深綠色或藍(lán)黑色,內(nèi)含種子1粒





