Diphasiastrum sitchense, the Sitka clubmoss, is a pteridophyte species native to northern North America and northeastern Asia. It is a terrestrial herb spreading by stolons running on the surface or the ground or just slightly below the surface. Leaves are appressed, broadly lanceolate, up to 3.2 mm (0.13 inches) long. Strobili are solitary on the ends of shoots.Wilce, J. H. 1965. Section Complanata of the genus Lycopodium. Beihefte zur Nova Hedwigia 19: i--ix, 1--233, plate 40. It is known from every province in Canada, plus the US States of Alaska, Oregon, Washington, Idaho, Montana, Maine, New Hampshire, Vermont, and New York.Beitel, J. M. 1979. The clubmosses Lycopodium sitchense and L. sabinaefolium in the upper Great Lakes area. Michigan Bot. 18: 3--13.Biota of North America Program 2014 state-level distribution map It is also found in Greenland, St. Pierre and Miquelon, Yukon, Japan, and the Kamchatka Peninsula of Asiatic Russia. It can be found in alpine meadows, open rocky barrens, and coniferous woodlands.Flora of North America, Diphasiastrum sitchense (Ruprecht) Holub, 1975. Sitka club-moss, lycopode de Sitka Holub, J. 1975. Diphasiastrum, a new genus in Lycopodiaceae. Preslia 14: 97--100.
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