羅布(bu)麻(ma),為(wei)夾竹桃科(ke)羅布(bu)麻(ma)屬直立(li)半(ban)灌(guan)木,高可達(da)4米,枝條對(dui)生或互生,光(guang)滑無毛(mao),紫紅(hong)(hong)色(se)或淡紅(hong)(hong)色(se)。葉(xie)對(dui)生,葉(xie)片(pian)橢圓(yuan)狀(zhuang)披(pi)(pi)針(zhen)(zhen)形(xing)(xing)至卵(luan)圓(yuan)狀(zhuang)長圓(yuan)形(xing)(xing),葉(xie)緣(yuan)具(ju)細牙齒,兩(liang)面無毛(mao);圓(yuan)錐狀(zhuang)聚傘花(hua)(hua)(hua)序頂生(有(you)時(shi)腋生)一至多(duo)歧,苞(bao)片(pian)膜質(zhi),披(pi)(pi)針(zhen)(zhen)形(xing)(xing),花(hua)(hua)(hua)萼深裂,裂片(pian)披(pi)(pi)針(zhen)(zhen)形(xing)(xing)或卵(luan)圓(yuan)狀(zhuang)披(pi)(pi)針(zhen)(zhen)形(xing)(xing),兩(liang)面被(bei)短柔毛(mao),邊(bian)緣(yuan)膜質(zhi),花(hua)(hua)(hua)冠(guan)圓(yuan)筒狀(zhuang)鐘(zhong)形(xing)(xing),紫紅(hong)(hong)色(se)或粉紅(hong)(hong)色(se),花(hua)(hua)(hua)藥(yao)箭頭(tou)狀(zhuang),隱(yin)藏(zang)在(zai)花(hua)(hua)(hua)喉內,花(hua)(hua)(hua)絲短,密被(bei)白茸毛(mao)。其分布(bu)于中國新疆、青海、甘肅、陜西、山西、河(he)南、河(he)北、江蘇、山東、遼寧及內蒙古等(deng)省區,主要野生在(zai)鹽(yan)堿荒地和沙漠(mo)邊(bian)緣(yuan)及河(he)流(liu)兩(liang)岸、沖(chong)積(ji)平原、河(he)泊(bo)周圍及戈壁荒灘(tan)上,有(you)引種(zhong)栽(zai)培馴化。