oil plant
/ˈɔɪl ˌplɑːnt/ /ˈɔɪl ˌplant/noun
Any of various plants yielding an oil; specifically (a) sesame, Sesamum indicum; (b) bok choy, Brassica chinensis; (c) regional ( Irish English ), sundew, Drosera rotundifolia. Now usually with distinguishing word, as in castor-oil plant.
Origin
Mid 18th century; earliest use found in Patrick Browne (c1720–1790), physician and botanist. From oil + plant.