Lemna polyrhiza Linnaeus, Species Plantarum 2: 970. 1753.

"Habitat in Europae paludibus fossis." RCN: 7043.

Type not designated.

Original material: [icon] in Ray, Syn. Meth. Stirp. Brit., ed. 3: 129, t. 4, f. 2. 1724; [icon] in Micheli, Nov. Pl. Gen.: 16, t. 11, f. 1. 1729.

Current name: Spirodelapolyrhiza (L.) Schleid. ( Lemnaceae).

Note: Although Riedl (in Rechinger, Fl. Iranica 119: 2. 1976) indicated material in the Clifford herbarium as type, there is none preserved there.