Ornduffia umbricola

Slender tufted perennial or sometimes annual 5–105 cm high; stolons absent. Petioles of basal leaves 2.5–43 cm long; blades aerial (rarely floating), erect, ovate to almost circular, 1–8(–12) cm long, entire, rounded to moderately cordate at the base, surfaces more or less uniform, thin-textured. Panicle lax, slender, occupying much of the flowering stem. Flowers homostylous; calyx (3–)6–9 mm long; corolla 11–31 mm diam., lobes (4–)5(–6), with broad entire to crenulate wings, not keeled; stigmas 2. Fruiting pedicels 5–40(–62) mm long, recurved; capsule 5–11 mm long, equal to or usually longer than calyx, adnate to calyx-tube only at base; seeds ellipsoid to subglobular, somewhat laterally compressed, (0.8–)1–1.4(–1.6) mm long, pale fawn to light brown, smooth or tuberculate; caruncle absent.