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Physostigma
http://www.ibiblio.org/herbmed/eclectic/kings/physostigma.html
Description and use of Physostigma venenosum.
Physostigma venenosum
http://www.botanical.com/botanical/mgmh/c/calbea05.html
Calabar Bean, short description and medicinal uses
Physostigma venenosum
http://plants.usda.gov/cgi_bin/plant_profile.cgi?symbol=PHVE11
Calabar bean.