Noun | 1. | ![]() herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests genus Oxalis - type genus of the Oxalidaceae; large genus of plants having leaves that resemble clover and variously colored flowers usually clustered in umbels common wood sorrel, cuckoo bread, Oxalis acetosella, shamrock - Eurasian plant with heart-shaped trifoliate leaves and white purple-veined flowers Bermuda buttercup, English-weed, Oxalis cernua, Oxalis pes-caprae - South African bulbous wood sorrel with showy yellow flowers creeping oxalis, creeping wood sorrel, Oxalis corniculata - creeping much-branched mat-forming weed; cosmopolitan Oxalis violacea, violet wood sorrel - perennial herb of eastern North America with palmately compound leaves and usually rose-purple flowers oca, Oxalis crenata, Oxalis tuberosa, oka - South American wood sorrel cultivated for its edible tubers |