Cleistanthus collinus is a plant species first described by Roxburgh, with its current name after Bentham and Hooker; it is included in the family Phyllanthaceae. The IUCN categorizes this species as vulnerable. No subspecies are listed in the Catalogue of Life.
Cleistanthus collinus (Karra) contains a plant poison also called oduvan (Tamil), kadise (Kannada), Vadisaku (Telugu), Oduku (Malayalam) and Gaja Madara (Sinhala) . Ingestion of its leaves or a decoction of its leaves causes hypokalemia ...