yellow-petalled flowers of oxalis pes-caprae

acid agriculture angiosperms background bloom blooming blossom blossoms botany bright buttercup cape caprae closeup colorful common diuretic english flora floral flower flowering flowers folk fresh garden golden green invasive medicine natural nature noxious oxalic oxalidaceae oxalidales oxalis pes pescaprae petal petals plant sorrel sourgrass soursop spring weed wildflower woodsorrel yellow