Plants sparsely pubescent, stoloniferous herbs. Stolons with adventitious roots at the nodes, roots 0.1-0.3 mm thick; stoloniferous stems 0.3-0.6(-1) mm thick, sparingly to profusely branched, occasionally with short lateral shoots with very crowded nodes; internodes (0.5-)1-2 (-4) cm long. Leaves petiolate; petioles 1-5 (-10.5) cm long, 0.2-0.5 (-0.9) mm thick, weak, arcuate or curvilinear; blades suborbicular-reniform, (6-)10-20 (-25) mm long, (9-)12-22 (-30) mm wide, bases broadly cordate with a relatively shallow sinus, tips rounded or shallowly emarginate, lower surfaces sparsely pubescent, upper surfaces nearly glabrous. Flowers pedicellate; pedicels (4-)8-20 (-42) mm long, 0.2-0.3(-0.5) mm thick, erect; calyces narrowly campanulate; sepals spatulate, 1.5-3 mm long at anthesis, 3.5-5 (-6) mm in fruit, accrescent, densely pilose on back, more than twice as long as wide; corollas campanulate, 1.5-3 mm long, shorter than calyces, glabrous, creamy-white; filaments 1 mm long; anthers 0.3 mm long; styles ca. 1-1.3 mm long. Fruits utricles 2-3 mm long, 1.6-2 mm thick in diameter, sparsely short-pilose; seeds pyriform, ca. 1.8-2.7 mm long.
Dichondra carolinensis is native to the southeastern United States and, possibly, the Caribbean. It differs from Dichondra micrantha, another widely introduced weedy species of Dichondra, in having calyx lobes that more than twice as long as wide and exceed the fruits and pedicels that are not sharply recurved below the calyces.
Reference
Tharp, B.C. & M.C. Johnston. 1961. Recharacterization of Dichondra (Convolvulaceae) and a revision of the North American species. Brittonia 13:346-360.