大菅(读作 jian)草又名苞子草和宝子草,广东德庆等地称为坝草。禾本科菅属,多年生,簇生草本植物。秆高2～3米,粗壮直立,叶片线形。耐旱、耐瘠,对土壤条件要求不高,生长于山坡、河边、荒滩等地。其根系极为发达,萌蘖性极强。自然飞花繁殖力强,尾叶繁 Big Jian (pronounced jian) grass, also known as grass and Baocao grass, Guangdong Deqing and other places called dam grass. Gramineae genus, perennial, cluster herb. Culms 2 to 3 meters tall, stout erect, leaf linear. Drought tolerance, barren, less demanding on soil conditions, growth in the hillside, river, wasteland and other places. Its root system is extremely developed, extremely sprouting. Strong natural fecundity, tail leaf complex