The leaves of southern dewberry are compound, usually consisting of three to five leaflets. Each leaflet measures approximately 2-3 inches (5-7.5 cm) in length. The leaves exhibit a characteristic dark green color during the growing season, transitioning to a reddish hue during the winter months. They are oval to lance-shaped with serrated edges and a rough, hairy texture on the upper surface. The vein pattern is pinnate, with a prominent central vein and smaller lateral veins extending outward.

The white flowers of southern dewberry are usually solitary, appearing at the ends of short flowering branches. Each flower typically features five delicately arranged petals that form a simplistic yet elegant shape. The flowers measure approximately 1-1.5 inches (2.5-3.8 cm) in diameter. They exhibit a light, subtle fragrance that adds to their allure. Blooming primarily from March to June, these flowers are an essential identifying feature of southern dewberry.

Southern dewberry stems are slender and can trail up to 15 feet (4.6 meters) in length. Young stems feature sharp bristles and prickles, while older, trailing stems display glandular bristles. The stems are green to reddish-green, cylindrical, and exhibit a rough texture. They are covered in small, hard, and recurved thorns that aid in identifying the plant. Stems have a robust, sprawling growth habit, often forming dense tangles in open, sunny habitats.

The fruit of southern dewberry emerges as a noteworthy display from April to May. These fruits boast a deep black hue when ripe, immediately distinguishing them in their natural habitat. The drupes of southern dewberry feature an aggregate structure, where multiple smaller units cluster together to form the larger fruit body. Measuring up to 1 inch (2.5 cm) in diameter, they are known for a plump, juicy texture, and are commonly adorned with a fine, glossy finish. While handling these fruits, one may notice their tendency to stain due to the richness of their color.