Stems glabrous or sparsely villous. Leaves alternate or fas­cicled; stipules symmetrical; petioles of basal leaves 0.3–0.8 cm, those of distal leaves 0.2–2.5 cm; blade 0.8–4(–8.5) cm, apex sometimes glandular-mucronate, surfaces shiny, glabrous, rarely ciliate or minutely pellucid-punctate. Flowers: anthers on short filaments 0.5–1.1 mm, those on long filaments 0.8–1.2 mm; ovary 6–14 mm, apex truncate, glabrous or with scattered hairs, stigma usually as long as anthers, rarely exserted beyond them. Capsules 10–17(–25) × 2–3 mm, pedicel 10–35 mm. Seeds 7–14 per locule. 2n = 16.

Phenology: Flowering summer–early fall.
Habitat: Wet places, along slow-moving rivers, streams, canals, ditches, often growing into main channels as aquatic weeds.
Elevation: 0–900[–3000] m.

Distribution

• Generated Map
• Legacy Map

Ariz., Calif., N.Mex., Oreg., Tex., Mexico, West Indies (Cuba), Central America, South America, Pacific Islands (Galapagos Islands), introduced elsewhere in Pacific Islands (Society Islands), Australia.

Discussion

Selected References

None.

Lower Taxa

None.