Creeping Woodsorrel
(Yellow sorrel, Weedy oxalis)

Oxalis corniculata

A common, weedy exotic, native to Europe. It is a short-lived perennial of lawns, gardens and disturbed areas but scarce in wilderness areas. It can spread from seed or by rooting from stems where they touch the ground. Bulblets extend from a central taproot.  The mature fruit forms a cylindrical capsule which opens explosively when touched. The foliage contains oxalic acid, and may be eaten raw in small quantities. 

Oxalidaceae

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