Japan Flora: Stems rather short, much branched, forming a dense mat, the branchlets ascending; leaves all alike, multifari­ous, persistent, subulate-linear, about 2 mm. long, 0.5 mm. wide, abruptly acuminate, filiform-tipped, ciliate, gray-green, narrowly and deeply grooved on back, appressed or ascending and incurved at tip when dried; spikes 4-angled, sessile, the bracts all alike, in 4 rows, narrowly deltoid, 1.5-2 mm. long, short awn-tipped, ciliate; megaspores with prominent primary reticulations.  Rocks.

Hokkaido (Hidaka and Kitami Prov. including Rebun and Riishiri Isis.); rare. Sakhalin, n. Korea, e. Siberia to Alaska.