What kind of plant is cattail grass?

Baidu found it: annual herb, 15 ~ 90 cm high. The fibrous roots are thin and dense. Culms tufted, erect or knee-bent at base. The leaves are flat or folded, 65438 0.5 cm long and 3 ~ 5 mm wide, with no hair or warts on the surface; Leaf sheaths are flat, ridged, hairless or sparsely warty, and the mouth is sometimes pilose; The ligule is about 65438 0 mm long. Spikes, 3 ~ 10 cm long and 3 ~ 5 mm wide, often arranged with fingers at the top of stems (rarely 2); Spikelets have 3 ~ 6 flowers, 4 ~ 7 mm long and 2 ~ 3 mm wide; The glume is lanceolate, 1 glume length 1.5 ~ 2 mm, and the second glume length is 2 ~ 3mm；; 1 lemma is 3 ~ 3.5 mm long with narrow wings on the ridge; The seeds are oblong, nearly triangular, about 65438 0.5 mm long, with obvious wavy wrinkles. The flowering and fruiting period is from June to 65438+ 10. Used in the wild. Distributed all over the country.