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Ranunculus
http://www.funet.fi/pub/sci/bio/life/plants/magnoliophyta/magnoliophytina/magnoliopsida/ranunculacea
Classification and images.
Ranunculus bulbosus
http://www.botanical.com/botanical/mgmh/b/butcup97.html
short description and medicinal uses
Ranunculus hawaiensis
http://www.botany.hawaii.edu/faculty/carr/images/ran_haw.jpg
image
Ranunculus hawaiensis
http://www.botany.hawaii.edu/faculty/carr/images/ran_haw_fl.jpg
image
Ranunculus reconditus
http://www.wa.gov/dnr/htdocs/fr/nhp/refdesk/fguide/htm/fsp_rare.htm
Images, description, and status in Washington state, USA.