Nymphoides hydrocharoides (F.Muell.) Kuntze
- Kuntze, O. 1891. Revisio Generum Plantarum. p. 429.

• Limnanthemum hydrocharoides (F.Muell.) F.Muell. ex Benth.
  - Bentham, G. 1869. Flora Australiensis. v. 4 p. 369-382.
• Villarsia hydrocharoides F.Muell
  - Mueller, F. von. 1868. Fragmenta phytographiae Australiae. v. 6 p. 136-142.

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status	collector	date	locality	deposited
type	Dallachy		In swamps at Rockingham's Bay.	GOET

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Villarsia hydrocharoides F.Muell
- Mueller, F. von. 1868. Fragmenta phytographiae Australiae. v. 6 p. 136-142.

Natans, petiolis folio cordato longioribus, pedicellis axillaribus solitariis geminisve elongatis, corollae pallidae lobis haud v. imperfecte fimbriatis ecristatis, fauce dense fimbriifera, stylo perbrevi, capsula evalvi ovata calycem paulo superante oligosperma, seminibus majusculis velutinellis compresso-globosis immarginatis nigro-fuscis, strophiola membranea rhombeo-orbiculata denticulata.	Floating. Petioles longer than the cordate leaf. Pedicels axillary, solitary or paired, elongate. Lobes of the pale corolla barely or imperfectly fimbriate, without a median wing, throat densely fimbriate. Style very short. Capsule not valved, ovate, surpassing the calyx by a little, few-seeded. Seeds mostly [velutinellis], compressed-globose, immarginate, cloudy-black, strophiole membranaceous, with rhomboid-orbiculate teeth.
Ad sinum Rockingham's Bay in stagnis. Dallachy.	In swamps at Rockingham's Bay. Dallachy.
Caules, speciminibus examinatis, breves, radicantes, haud articulati. Folia 1-1½ " metentia, non bullosa. Petioli folio paulo v. aliquoties breviores. Calycum segmenta 2-3"' longa. Corolla, quantum e statu sicco judico, albida nisi pallide flava; loborum margines latiuscule alati. Antherae oblongae, sursum attenuatae, supra basim fixae. Semina ¾"' metentia. Strophiola bene evoluta saepe trientem seminis aequans.	Stems, in specimens examined, short, radical, hardly jointed. Leaves measuring 1-1.5 in [2.5-3.8 cm], not blistered. Petioles by a little or sometimes shorter than the leaf. Segments of the calyces 2-3 lin [4-6 mm] long. Corolla, as much as I judge from the dried state, white or pale yellow; margins of the lobes rather broadly winged. Anthers oblong, attenuated upwards, fixed above the base. Seeds measuring 0.8 lin [1.6 mm]. Strophiole well evolved, often equaling the third part of the seed length.
Planta imprimis seminibus a V. geminata divellitur.	The plant differs primarily in seeds from V. geminata.