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Description of Hydnoraceae
http://biodiversity.uno.edu/delta/angio/www/hydnorac.htm
Habit and leaf form; Anatomy; Morphology; Physiology; Biochemistry; Geography.
Parasitic Plants - Hydnoraceae
http://www.science.siu.edu/parasitic-plants/Hydnoraceae/
Description, range map, and images of Hydnora and Prosopanche.