Ten stamens - 5 short, 5 long in whorls. Santiago Oaks Regional Park, Orange, CA. 1-20-08. © Joan Avise

Bermuda Buttercup

Oxalis pes-caprae

An introduced perennial herb (rare and endangered in its native South Africa) which forms low clumps in disturbed areas and spreads by production of bulb offsets and lateral runners. It often grows in dense colonies, forming a monoculture.  It is an increasingly aggressive invader of native plant communities in coastal California including, for example, parts of Santiago Oaks Regional Park and Crystal Cove State Park.

Species Focus Oxalis pes-caprae By Jake Sigg

Oxalidaceae

Back to Oxalidaceae of Orange County, California
Back to Eudicots of Orange County, California
Back to Natural History of Orange County, California


Five sepals and five petals. Crystal Cove State beach, Laguna beach, CA. 11-17-07. © Joan Avise

Each stalk with 3-10 flowers, which bloom in sequence. Crystal Cove State Beach, Laguna Beach, CA, 3-21-09. © Joan Avise

Three heart-shaped leaflets. Leaves and stems are edible, but the foliage is rich in oxalates, imparting a sour taste.  Santiago Oaks Regional Park, Orange, CA. 1-20-08. © Joan Avise