oxalis tuberosa(n = noun.plant) oca, oka, oxalis crenata - South American wood sorrel cultivated for its edible tubers;
is a kind of oxalis, sorrel, wood sorrel

apios tuberosa, asclepias tuberosa, creeping oxalis, genus oxalis, oxalis, oxalis acetosella, oxalis caprina, oxalis cernua, oxalis corniculata, oxalis crenata, oxalis pes-caprae, oxalis violacea, phalaris tuberosa, polianthes tuberosa