3 species
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Diphasiastrum alpinum × Diphasiastrum sitchensehybrid clubmoss
Distribution: Occurring in the Cascades and Olympic Mountains in Washington; Alaska to Oregon, east to Idaho; also in Greenland and Newfoundland.
Habitat: Upper montane coniferous forest and brushy areas, and subalpine and alpine meadows. In Washington, has been found in subalpine-alpine heath meadows and on shaded mossy mineral soil below conifers on high montane roadcuts.
Origin: Native
Diphasiastrum complanatumground cedar, trailing ground-pine
Distribution: Occurring on both sides of the Cascades crest in Washington, primarily in the northern half of the state; Alaska south to Washington, Idaho and Montana, east across Canada and the northern U.S. to the Atlantic Coast.
Habitat: Moist to dry, usually coniferous forests, rocky slopes and sandy openings, low to mid-elevations.
Origin: Native
Spores: Sporing structures in summer and fall
Diphasiastrum sitchenseAlaskan clubmoss, Sitka clubmoss
Distribution: Alaska to Oregon, east to Idaho and Montana, and across central Canada to northeastern U.S. and eastern Canada; also in eastern Asia from Japan north.
Habitat: Subalpine-alpine meadows and open rocky areas at mid-to high elevations in the mountains; occasionally in conifer forest or under brush.
Origin: Native