Knowltonia is a genus of the family Ranunculaceae. There are eight species native to South Africa. The juice from the stem of many of the species in the genus is a powerful vesicant. ==Species include== ... Found on http://en.wikipedia.org/wiki/Knowltonia
Knowltonia is a genus of perennial herbaceous South African plants belonging to the family Ranunculaceae. They bear branching cymes or umbels of dullish flowers. Found on http://www.probertencyclopaedia.com/browse/BK.HTM