Oxalis dillenii, commonly known as Southern Wood-Sorrel or Slender Yellow Woodsorrel, is a perennial herb that is native to a variety of habitats, including open woodlands, fields, and roadsides across eastern North America. It typically grows to a height of 4-10 inches (10-25 cm) and spreads to form a loose ground cover. The plant has clover-like leaves composed of three heart-shaped leaflets that fold downward in bright sunlight or when disturbed. Its yellow flowers, which are quite showy, have five petals and bloom from late spring to early fall. The fruit is a small, upright capsule that can explosively release seeds when ripe.

Southern Wood-Sorrel is appreciated for its delicate appearance and its ability to fill in as a ground cover in garden settings. It is drought-tolerant and can thrive in a range of soil types, though it prefers moist, well-drained soils and can tolerate partial shade to full sun. While it can be a charming addition to rock gardens, borders, or as a filler in container plantings, it can also become invasive outside its native range due to its efficient seed dispersal and tolerance of various conditions. Gardeners should be cautious about its potential to spread and should manage it accordingly to prevent unwanted colonization.CC BY-SA 4.0