About Carex macrocephala Willd. ex Spreng.
Carex macrocephala Willd. ex Spreng., commonly known as big-head sedge or largehead sedge, is a species of flowering plant that belongs to the Cyperaceae family. This species grows on beaches and dunes in regions along the northern Pacific Ocean. Its distribution includes Japan, Primorsky Krai, Sakhalin, the Kuril Islands, and Kamchatka in the Russian Far East, as well as Alaska, British Columbia, Washington state, and Oregon in North America.