Comments
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Plants from Greenland formerly identified as Huperzia selago are H . appalachiana .
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
provided by eFloras
Shoots erect, indeterminate, 8--12 cm, becoming short-decumbent; leaves of mature portion slightly smaller than leaves of juvenile portion (more pronounced in sun form); indistinct annual constrictions present (more pronounced in shade form); juvenile growth erect. Leaves spreading-ascending (shade) to appressed-ascending (sun) in mature portion, more reflexed in juvenile portion, green (shade) to yellow-green (sun), lustrous; largest leaves triangular, widest at base, 4--7.5 mm; smallest leaves lanceolate, 3.5--5 mm; margins almost entire, papillate; stomates on both surfaces, numerous on adaxial surface, 30--90 per 1/2 leaf. Gemmiferous branchlets produced in 1 pseudowhorl at end of annual growth; gemmae 4--5 X 3--4.5 mm, lateral leaves 1.5--2 mm wide, broadly acute. Spores 29--37 µm. 2 n = 268.
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Distribution
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St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon; Conn., Maine, Mass., Mich., Minn., N.H., N.Y., Ohio, R.I., Vt., Wis.; Europe; Asia.
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Habitat
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Terrestrial in sandy borrow pits, ditches, lakeshore swales, and conifer swamps, rarely on acidic, igneous rock or calcareous coast cliffs; 0--700 m, rarely to 1600m.
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Synonym
provided by eFloras
Lycopodium selago Linnaeus, Sp. Pl. 2: 1102. 1753; Plananthus selago (Linnaeus) Palisot de Beauvois; Urostachys selago (Linnaeus) Herter
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Huperzia selago
provided by wikipedia EN
Huperzia selago, the northern firmoss or fir clubmoss, is a vascular plant in the family Lycopodiaceae. It has a circumpolar distribution in temperate and boreal regions in both hemispheres.
Distribution and habitat
It is found in the northern parts of North America, Europe, and Asia.[2] It is found in sandy pits, ditches, along lakeshores, and in conifer swamps.[2]
In Europe, its range extends from Svalbard to the mountains of northern Spain and Italy, and from the British Isles east through central Asia to the Kamchatka peninsula, Japan, the Aleutian Islands, North America, Greenland and Iceland.
In the northeastern United States, it is found in boreal habitat, but not alpine zones.[1]
Uses
"Upper Tanana Indians used the whole plant in a poultice applied to the head for headaches".[1]
References
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Huperzia selago: Brief Summary
provided by wikipedia EN
Huperzia selago
Huperzia selago, the northern firmoss or fir clubmoss, is a vascular plant in the family Lycopodiaceae. It has a circumpolar distribution in temperate and boreal regions in both hemispheres.
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Huperzia selago 
