Oxalis articulata f. crassipes 'Alba'

Old fashioned garden plant from South America, ours selected from among old garden plants in our inherited garden. Both winter and summer growing, the dense tufts of spring-green, shiny, 1/2" leaves are supported by pine-cone-like caudices or tubers. In case Oxalis scares you, this plant rarely seeds and is increased somewhat slowly only by division of the clumps. The crisp white flowers begin for us in late winter and with good summer water continue -- well... into late winter. This year round flowering can be interrupted only by severe summer drought or winter temperatures below the upper teens F, with which they will go happily dormant only to spring back when their immediate climate changes. USDA zone 7. 

WHITE WOOD SORREL

Oxalidaceae