oxalis cernua(n = noun.plant) bermuda buttercup, english-weed, oxalis pes-caprae - South African bulbous wood sorrel with showy yellow flowers;
is a kind of oxalis, sorrel, wood sorrel

creeping oxalis, genus oxalis, oxalis, oxalis acetosella, oxalis caprina, oxalis corniculata, oxalis crenata, oxalis pes-caprae, oxalis tuberosa, oxalis violacea, spiranthes cernua