Oxalis

Annual or perennial herbs; leaves clover-like, long-stalked with 3 leaflets; flowers 5-parted, white, yellow, lavender, or rose, close at night; fruit a capsule

Grows best in full sun to 25% shade.  When planting, bury rhizomes or stolons 2 in. (5 cm) deep.  Best propagated by rhizomes and stolons or by seed.  O. deppei, O. lasiandra, and O. regnelli species are considered tender species.

Native to Europe, Asia-Tropical, Africa, Falkland Island, Pacific, Southern America, Australasia, Northern America, and Asia-Temperate.