羅布麻,為夾竹桃(tao)科羅布麻屬直立半(ban)灌木(mu),高可(ke)達4米,枝條對生(sheng)(sheng)或互(hu)生(sheng)(sheng),光滑無毛,紫紅(hong)(hong)色(se)或淡紅(hong)(hong)色(se)。葉(xie)對生(sheng)(sheng),葉(xie)片橢圓(yuan)(yuan)狀(zhuang)披針形至卵(luan)圓(yuan)(yuan)狀(zhuang)長圓(yuan)(yuan)形,葉(xie)緣具細牙齒(chi),兩(liang)面無毛;圓(yuan)(yuan)錐狀(zhuang)聚傘花序(xu)頂生(sheng)(sheng)(有時腋生(sheng)(sheng))一至多歧,苞(bao)片膜質(zhi),披針形,花萼深(shen)裂(lie),裂(lie)片披針形或卵(luan)圓(yuan)(yuan)狀(zhuang)披針形,兩(liang)面被(bei)(bei)短(duan)柔毛,邊緣膜質(zhi),花冠圓(yuan)(yuan)筒狀(zhuang)鐘形,紫紅(hong)(hong)色(se)或粉紅(hong)(hong)色(se),花藥箭(jian)頭狀(zhuang),隱(yin)藏(zang)在(zai)花喉內(nei),花絲短(duan),密被(bei)(bei)白茸毛。其分布于中國新疆、青海、甘肅、陜(shan)西、山西、河(he)南、河(he)北、江(jiang)蘇、山東、遼寧(ning)及(ji)內(nei)蒙古等(deng)省區,主要野(ye)生(sheng)(sheng)在(zai)鹽堿荒(huang)地和沙漠邊緣及(ji)河(he)流(liu)兩(liang)岸(an)、沖積平原、河(he)泊周圍及(ji)戈壁(bi)荒(huang)灘上(shang),有引種栽培馴化。