Yellow Buttercup Oxalis flowers

Oxalis pes-caprae (Bermuda buttercup, African wood-sorrel, Bermuda sorrel, buttercup oxalis, Cape sorrel, English weed, goat's-foot, sourgrass, soursob and soursop; is a species of tristylous flowering plant in the wood sorrel family Oxalidaceae. Indigenous to South Africa, Oxalis pes-caprae, the 'Bermuda buttercup', is an invasive species and noxious weed in many other parts of the world, including the United States (particularly coastal California), Europe, Israel and Australia. The plant has a reputation for being very difficult to eliminate once it has spread over an area of land. The weed propagates largely through its underground bulbs and this is one reason why it is so difficult to eradicate, as pulling up the stems leaves the bulbs behind. The Oxalis pes-caprae flower is actinomorphic, with a calyx composed of five free or slightly fused sepals, a sympetalous corolla composed of five fused petals, an apoandrous androecium composed of ten free stamens in two ranks, and a compound pistil. 3395

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