Carex vesicaria - Carex acutiformis

This image could have imperfections as it’s either historical or reportage.

Carex vesicaria - Carex acutiformis - old Names, Family Cyperaceae, 1. Carex vesicaria L., 2. Carex acutiformis Ehrh., 1. also bladder sedge, 1. Carex vesicaria, is an essentially Holarctic species of sedge known by the common name Blister Sedge. The dried fibers, sometimes used as thermal insulation in polar regions, are known as sennegrass, saennegrass or similar, from the plant s Bokmål name Sennegras., Carex, Caricology, genus of over 1500 species of grassy plants in the family Cyperaceae, commonly known as sedges., 2. Carex acutiformis, the lesser pond sedge, is a species of sedge., Synonyms Carex paludosa Good, Carex paludosa var. kochiana (DC.) Husn.