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Thalictrum
http://oregonstate.edu/dept/botany/herbarium/thalictrum/
Systematics, images, and database.
Thalictrum dioicum (Early Meadowrue)
http://www.rook.org/earl/bwca/nature/herbs/thalictrumdio.html
Taxonomy, physical features, range, habitat, reproduction, and fire ecology. Provides a photo.