Japan Flora: Stems long-creep­ing, loosely leafy, about 2 mm. across exclusive of the leaves; branches forked nearly to the base, 3-15 cm. long (inclusive of the fertile branchlets which are usually longer than the ster­ile), 3-5 mm. across inclusive of the leaves, somewhat glauces- cent, ascending at base; leaves of sterile branches ascending to suberect, incurved at tip, subulate，2-3 mm. long, 0.5-1 mm. wide, acuminate, entire, convex on back, concave inside, not keeled; spikes solitary on the branchlets, yellowish, cylindric, erect, sessile; branchlets 1-2 cm. long; bracts deltoid-orbicular, cuspidate, erose to undulate on margin. Sunny slopes among mosses and lichens in alpine regions.

Hokkaido, Hon­shu (centr. and u. distr.), Kyushu (Yakushima); rather rare.  Kuriles. The typical variety occurs in Kamchatka, the Aleutians, and N. America.

Russia Flora: Plant up to 15 cm tall. Creeping stems superficial, with sparsely arranged phyllodia, about 2 mm in diameter. Vertical branches ascending, dichotomously branched in the lower part, up to 5 mm wide, glaucous. Phyllodia homogeneous subulate, ascending or more or less appressed to the stem, 2-3 mm long, 0.5-1 mm wide, pointed, convex on the back, concave below. Strobiloids up to 2 cm long, on branchlets up to 3 cm long, distinguished by more stem-appressed phyllodia. Sporophylloids deltoid-triangular, up to 4 mm long, more or less gradually pointed, with uneven wavy membranous margin. Sporangium reniform, 0.6 mm long.  

Kamchatka, Commander Islands, Northern Kuril Islands, Southern Kuril Islands — Coastal terraces, as well as in mountain tundras in subalpine and alpine belts, on open stony areas. VII-VIII. — General distribution: North America. — Described from Sitka Island (off the west coast of Alaska, USA).

Note: The indication for the Soviet Far East (Flora of the European part of the USSR, 1974, 1: 56) of Lycopodiella inundata (L.) Holub is not confirmed by herbarium materials.