羅布麻(ma),為夾竹桃科(ke)羅布麻(ma)屬直立半(ban)灌木,高(gao)可達4米,枝條對生或(huo)互生,光滑(hua)無毛,紫紅(hong)色或(huo)淡紅(hong)色。葉對生,葉片(pian)橢圓(yuan)(yuan)狀(zhuang)披(pi)(pi)針(zhen)形(xing)至卵(luan)圓(yuan)(yuan)狀(zhuang)長圓(yuan)(yuan)形(xing),葉緣具細牙齒,兩(liang)(liang)面無毛;圓(yuan)(yuan)錐(zhui)狀(zhuang)聚傘花(hua)(hua)序頂生(有時(shi)腋生)一至多(duo)歧,苞(bao)片(pian)膜質(zhi),披(pi)(pi)針(zhen)形(xing),花(hua)(hua)萼深裂(lie),裂(lie)片(pian)披(pi)(pi)針(zhen)形(xing)或(huo)卵(luan)圓(yuan)(yuan)狀(zhuang)披(pi)(pi)針(zhen)形(xing),兩(liang)(liang)面被短柔(rou)毛,邊緣膜質(zhi),花(hua)(hua)冠(guan)圓(yuan)(yuan)筒狀(zhuang)鐘形(xing),紫紅(hong)色或(huo)粉紅(hong)色,花(hua)(hua)藥箭頭狀(zhuang),隱藏在(zai)花(hua)(hua)喉內,花(hua)(hua)絲短,密被白茸毛。其(qi)分布于中國(guo)新疆、青海、甘肅、陜西、山(shan)西、河南、河北、江蘇(su)、山(shan)東、遼寧及內蒙古(gu)等(deng)省區,主(zhu)要野生在(zai)鹽堿荒(huang)地(di)和沙漠邊緣及河流兩(liang)(liang)岸(an)、沖積(ji)平原(yuan)、河泊周圍及戈(ge)壁荒(huang)灘上,有引種栽(zai)培馴(xun)化。