Rattlesnake Fern, Rattlesnake Grapefern, Common Grapefern, Virginia Grapefern
Botrychium virginianum
Synonyms: Botrychium virginianus, Botrypus virginianus, Osmunda virginiana
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Fertile and sterile fronds of rattlesnake fern as seen in a moist conifer forest around the edges of a fen at the south side of Lost Lake, Okanogan National Forest...........July 12, 2015.
Paul Slichter