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Oxalis stricta

Yellow Wood Sorrel
Oxalis stricta

Family: Wood Sorrel (Oxalidaceae)
AKA: Common Yellow Oxalis, Sour Grass
Photo taken on: September 23, 2011
Location: White Rock, NM
Life Zones: Plains to montane
Habitat: Gardens, woods, moist canyons

Very low growing plant with shamrock-like leaves. The leaves are edible but have a sour taste. The leaves fold back at night. Considered an invasive weed by gardeners.

Flora of North America reference.

Yellow Single Flowers