Diodia virginiana L.

Herbs, perennial, prostrate to weakly ascending, to 60 cm tall; stems 4-angled, retrorse pilose or-pilosulous along angles. Leaves petiolate; petiole ca. 3 mm; blade drying papery, elliptic-lanceolate to oblanceolate, 20-32 × 4-8 mm, both surfaces glabrescent, base cuneate and sometimes oblique, apex acute; secondary veins 4 or 5 pairs; stipule sheaths truncate to rounded, 2-3 mm, glabrous, with 3-5 setae 1-4 mm. Flowers 1 or sometimes 2 or 3 per axil, 2 or sometimes 4-6 per node; bracts reduced. Calyx villous to pilose; ovary portion obconic, ca. 1 mm; lobes narrowly triangular-lanceolate, [2-]5-7[-10] mm, often unequal on an individual flower. Corolla white, glabrous inside and outside; tube 5.5-6 mm; lobes triangular, 4-5[-6] mm, sometimes pubescent adaxially. Fruit corky, ellipsoid, 6-9 × 4-6 mm, distinctly 8-ridged, pilose or villous to glabrescent, usually not separating into mericarps; seeds 5-6 × 2-3 mm, reticulate. Fl. and fr. Aug-Sep.