Oxalis montana Raf.
Oxalis acetosella auct. non L.
Oxalis acetosella L. ssp. montana (Raf.) Hultén ex D. Löve
Oxalis acetosella L. var. rhodantha (Fernald) R. Knuth
Common Wood Sorrel, Mountain Woodsorrel, Wood Shamrock, White Woodsorrel, Wood Sorrel
Wood sorrel’s name is an English distortion of sorrel de boys, a Middle French expression meaning “sour,” a reference to the taste of the leaves.
Identification: Woodsorrels are less than 4" (10 cm) high, with groups of three heart-shaped leaflets that resemble clover. They are found on forest floors, in rich and somewhat moist soils, and can tolerate shade. The leaves are stemless, emerging directly from the roots. They fold and unfold slowly in response to sunlight. Flowers are white or pink, with darker pink veins and five petals, about ¾" (1.9 cm) around. The fruit is a capsule.
Oxalis montana on Earl J.S. Rook's Flora, Fauna, Earth, and Sky ... The Natural History of the Northwoods
Oxalis montana on Plants for a Future, a resource and information centre for edible and otherwise useful plants
Oxalis montana on the USDA Plants Database
Oxalis montana on the Connecticut Botanical Society's Connecticut wildflowers site
Oxalis montana on the USDA Forest Service's Fire Effects Information Database
Oxalis montana at the University of Wisconsin's Robert W. Freckmann Herbarium
Oxalis montana on Wildflowers of the United States
Oxalis montana description by Thomas H. Kent, last updated 2 Oct 2013.