Creeping Yellow Wood-sorrel, Creeping Wood-sorrel: Oxalis corniculata -

Oregon Wood Sorrel, Redwood Sorrel, Sour Grass, Western Wood Sorrel: Oxalis oregana (Synonyms: Oxalis oregana var. oregana, Oxalis oregana var. smallii) - Herbaceous ground cover. The flowers with 5 petals are generally white or white with red candy stripes. the leaves are a key diagnostic characteristic, being 3 heart-shaped leaflets with the apex of each leaflet pointed in towards the stem.

Common Yellow Oxalis, Yellow Wood-sorrel: Oxalis stricta - ?

Western Yellow Wood-sorrel, Western Yellow Oxalis, Suksdorf's Wood-sorrel, Suksdorf's Oxalis: Oxalis suksdorfii -

Great Wood-sorrel, Great Oxalis, Trillium-leaved Oxalis: Oxalis trilliifolia -