Isoetes
quillwort
8 species
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Isoetes bolanderiBolander's quillwort
Origin: Native
Isoetes howelliiHowell's quillwort
Origin: Native
Isoetes maritimamaritime quillwort
Origin: Native
Isoetes minimamidget quillwort
Distribution: Currently known only from Kittitas and Spokane Counties in Washington, and in south-central British Columbia.
Habitat: Seasonally moist swales and vernal pools at middle elevations among open conifer forest or sagebrush-steppe.
Origin: Native
Spores: June
Isoetes nuttalliiNuttall
Origin: Native
Isoetes occidentaliswestern quillwort
Distribution: Occurring chiefly west of the Cascades crest; Alaska to California, east to the Rocky Mountains.
Habitat: Submerged in ponds and lakes, often in deep water, from the lowland to middle elevations in the mountains.
Origin: Native
Isoetes tenellabristle-like quillwort, spiny spored quillwort
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, also eastward to the Great Lakes region and northeastern North America; circumboreal.
Habitat: In shallow water or along shorelines of ponds and lakes, from the lowlands to middle elevations in the mountains.
Origin: Native
Isoetes ×truncata
Origin: Native