Sprawling or very rarely somewhat erect, sympodial, annual herbs, 0.03-0.25 m tall. Stems herbaceous, immaculate, usually very well-branched at base; branches prostrate to decumbent or rarely somewhat ascending to erect, not sprouting from the nodes. Leaves 15-60 x 6-20 mm, glabrous or scabrid, 2-pinnate, herbaceous to somewhat coriaceous; ultimate leaflet segments linear-oblong, 1-10 x < 1 mm, laminate to subterete, concolorous, green or glaucous, margins entire, venation visible. Petioles 7-30 mm long, glabrous or scabrid. Umbels shortly pedunculate, very rarely sessile to subsessile, peduncles (0-)6-30 mm long; involucral bracts 1 to 6, lanceolate to ovate or often foliose, coriaceous, acuminate, margins membranous, glabrous or scabrid; rays 4 to 12, 5-15 mm long, glabrous or scabrid; involucel bracts 2 to 6, linear to lanceolate, coriaceous, acuminate, margins often membranous, glabrous or scabrid; raylets 4 to 12, 2-5 mm long, glabrous or scabrid. Flowers with petals 0.7-1 x 0.7-1 mm, deeply emarginate, papillose; ovary scabrid to pustulate; styles lengthening as fruit matures, 0.7-1.3 mm long, becoming reflexed and extending well beyond base of stylopodium and often beyond base of fruit. Fruit 0.6-1.8x1.0-1.8 mm, transversely oblong (broader than long), base cordate; mericarps homomorphic, scabrid to pustulate; median and lateral ribs as well developed as marginal ribs, slightly prominent, cartilaginous, dorsal surface without fibrous ridges, scabrid to pustulate; marginal ribs strongly concave in lateral view.
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Like D. hispidum but plants usually sprawling and prostrate, fruit transversely oblong (broader than long) and mericarps with marginal ribs strongly concave in lateral view, scabrous to warty.
Like D. hispidum but usually sprawling and prostrate, fruit transversely oblong (broader than long) and mericarps with marginal ribs strongly concave in lateral view, scabrous to warty.