Oxalis

From Turf Wiki

• Scientific Name: Oxalis stricta L.

Oxalis has trifoliate, heart-shaped leaflets

Oxalis has 5-petaled yellow, trumpet-like flowers

Oxalis becomes noticable in cool season turfgrass during hot, dry weather

Oxalis fruit is an okra-shaped pod

• Common Names: Yellow Woodsorrel (United States), Common Yellow Oxalis, Dillen's Oxalis, Sour grass, Szczawik zolty (Polish), Toad sorrel, Upright oxalis, Upright Yellow Wood-sorrel, Wood Sorrel

• Climatic Zone: Temperate

• Geographic Distribution: Africa, Australia, East Asia, Europe, North America

• Life Cycle: Annual to perennial depending on location

• Photosynthetic Apparatus: C4

• Major Identifying Characteristic: Heart-shaped trifoliate leaves