The leaves of sand blackberry are compound, featuring 3 leaflets that are densely white-hairy beneath. Each leaflet is broadest beyond the middle, tapering with somewhat rounded tips. They measure around 1-4 inches (2.5-10 cm) in length and exhibit a distinctive pleated appearance. The leaves’ texture is slightly coarse, and their vein patterns are subtle, adding to the unique texture. This combination of features makes the leaves easily identifiable to plant enthusiasts.

Sand blackberry flowers bloom from April to June and are characterized by their pristine white color. Each flower consists of 5 rounded, delicate petals and 5 green sepals, surrounding a multitude of stamens at the center. Typically measuring about 1 inch (2.5 cm) across, these blossoms are known for producing apomictic flowers, resulting in fruit and viable seeds without fertilization. These features make the flowers distinct and easily identifiable, particularly during their blooming season.

Sand blackberry has upright canes that transition from green to brown as they age. They are armed with numerous prickles, lending a rough texture to the stems. The canes are relatively thick, measuring approximately 0.2 to 0.6 inches (0.5 to 1.5 cm) in diameter. The surface is slightly ridged and canes are usually unbranched or sparsely branched. This combination of color, texture, and prickles are distinguishing features helpful for plant identification.

The fruit of sand blackberry presents as an aggregation of juicy black drupelets, typical of the Rubus genus. Appearing from June to July, these fruits are known for their dry yet pleasantly sweet taste and good flavor. Each berry-like cluster is edible, both raw or cooked, inviting a variety of culinary uses. Texturally, the fruit's surface is often times slightly rough, with a firmness common among Rubus species. Their coloration ranges from a deep, glossy black when ripe. Bearing such distinctive traits, these fruits are readily identified and enjoyed during their summer display.