새방울사초-Carex vesicaria L.

Carex vesicaria is an essentially Holarctic species of sedge known as bladder sedge, inflated sedge, and blister sedge. It has been used to insulate footwear in Norway and among the Sami people, and for basketry in North America

Carex vesicaria is a perennial plant with short creeping rhizomes which grow shoots resembling small tufts. It grows to heights of 30 to 120 cm (12 to 47 in). Its stems are rough near the tip but smoother towards their base. The narrow, ridged and pleated leaves can grow to around 1 m (3.3 ft) in length or more, and have fine toothed edges and sharp points. The fruits are erect, glossy and bulbous. The flower clusters are long and cylindrical in shape and each contains up to 150 developing fruits.

en.wikipedia.org/wiki/Carex_vesicaria