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牛毛毡(Heleocharis yokoscensis)又名牛毛草、松毛蔺、绒毛头,属莎草科、荸荠属多年生湿生草本植物。其生长的匍匐根状茎非常细,细如毫发,而且数量很多,密密麻麻丛生在一起,形似牛毛毡,因而有此俗名。牛毛毡高度2～12厘米,叶鳞片状,小穗卵形,长约3毫米、宽2毫米,淡紫色,小坚果狭长圆形,呈浑圆状,长1.8毫米、宽0.8毫米,微黄玉白色,花果期为4～11月。
Heelocharis (Heleocharis yokoscensis), also known as ox hair grass, pine hair, velvet hair, is a sedge Branch, water chestnuts are perennial wet plants. Its growth creeping rhizomes are very thin, thin as hair, and a large number, densely crowded together, shaped like cattle blankets, so this common name. Cowhide height 2 ~ 12 cm, leaf scales, spikelets ovate, ca. 3 mm, width 2 mm, lavender, small nut narrowly oblong, rounded, 1.8 mm long, 0.8 mm wide, yellow topaz , Flower fruit period is 4 ~ November.