Pontederia rotundifolia Linnaeus, Plantae Surinameses: 7. 1775.

"Habitat [in Surinamo.]" RCN: 2294.

Lectotype (Lowden in Rhodora 75: 473. 1973): Dahlberg 137, Herb. Linn. No. 407.2 (LINN) .

Current name: Pontederia rotundifolia L. ( Pontederiaceae).

Note: See discussion by Horn & Haynes (in Taxon 36: 623. 1987), who concur with Lowden’s type choice.