Distribution
Russian Federation, Ukraine, United States of America

Native to: Alaska, Alberta, Altay, Amur, Arizona, Austria, Baltic States, Belarus, Belgium, British Columbia, Bulgaria, Buryatiya, Central European Rus, China North-Central, China South-Central, Chita, Colorado, Connecticut, Czechoslovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Greenland, Hungary, Idaho, Irkutsk, Italy, Japan, Kamchatka, Kazakhstan, Kentucky, Khabarovsk, Korea, Krasnoyarsk, Kuril Is., Labrador, Magadan, Maine, Manchuria, Manitoba, Maryland, Masachusettes, Michigan, Minnesota, Mongolia, Montana, Netherlands, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, Newfoundland, North Carolina, North European Russi, Northwest European R, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ontario, Oregon, Pennsylvania, Poland, Primorye, Prince Edward I., Québec, Rhode I., Romania, Sakhalin, Saskatchewan, South Dakota, Spain, Sweden, Switzerland, Taiwan, Tennessee, Turkey, Tuva, Ukraine, Utah, Vermont, Virginia, Washington, West Siberia, West Virginia, Wisconsin, Wyoming, Yakutskiya, Yukon.

Horizontal stems on substrate surface. Upright shoots clustered, mainly unbranched or sparsely branching mainly at base, 1.2-1.6 cm diam.; annual bud constrictions abrupt and conspicuous. Lateral branchlets few and like upright shoots but annual bud constrictions absent. Leaves spreading to reflexed, dark green, linear-lanceolate, (2.5-)5-8 × 0.6-1.2 mm; margins closely and shallowly dentate mainly in distal 1/2; apex sharply pointed, lacking hair tip. Strobili solitary, sessile on shoots, 15-30 × 3.5-4.5 mm. Sporophylls (1.5-)3.5 × 0.7(-2) mm, abruptly narrowed to pointed tip. 2 n = 68.
Habitat: Swampy or moist coniferous forests, mountain forests, and exposed grassy or rocky sites.
Elevation: 0-1850 m.
(Flora of North America)

Багаторічна трав'яна рослина 10-30 см заввишки. Стебло повзуче, у вузлах негусто укорінюється, вкрите лінійно-ланцетними листками (мікрофілами), які розташовані перпендикулярно до стебла або відігнуті донизу. Стробіли поодинокі, сидячі, ціліндричні, без ніжок. Спороносить у липні-вересні. Розмножується спорами і вегетативно.
(ЧКУ, 2009)