Nymphoides aquatica (J.F.Gmel.) Kuntze

Nymphoides aquatica (J.F.Gmel.) Kuntze
- Kuntze, O. 1891. Revisio Generum Plantarum. p. 429.

Trachysperma aquatica (J.F.Gmel.) House
- House, H.D. 1920. New York State Museum Bulletin 233-232: 66.
Nymphoides aquatica (Walt.) Fernald
- Fernald, M.L. 1908. Notes on some plants of NE America. Rhodora 10:55.
Nymphoides lacunosa (Vent.) Kuntze
- Kuntze, O. 1891. Revisio Generum Plantarum. p. 429.
Limnanthemum aquaticum (J.F.Gmel.)Britton
- Britton, N. 1889. Trans. New York Acad. Sci. 9:12.
Limnanthemum trachyspermum A.Gray
- Gray, A. 1867. Manual of the Botany of the Northern United States ed. 5 v. 1 p. 390.
Limnanthemum lacunosum β var. australe Griseb.
- Grisebach, A. 1839. Genera et Species Gentianearum. p. 336-348.
Villarsia trachysperma Elliott
- Elliott, S. 1821. A sketch of the botany of South-Carolina and Georgia 1: 230.
Trachysperma nutans Raf.
- Rafinesque-Schmaltz, C.S. 1808. Medical Repository. New York 5: 352.
Villarsia lacunosa Vent.
- Ventenat, E.P. 1803. Choix de Plantes. t. 9.
(Nymphoides lacunosa Fernald = N. cordata (Elliott) Fernald)
Menyanthes trachysperma Michx.
- Michaux, A. 1803. Flora boreali-americana 1: 124-126.
Villarsia aquatica J.F.Gmel
- Gmelin, J.F. 1791. Systema Naturae. Tomus II (Botany). ed. 13. p. 447.
Anonymos aquatica Walt. [nomen invalidum]
- Walter, T. 1788. Flora Caroliniana. p. 108-109.

status	collector	date	locality	deposited

Villarsia trachysperma Elliott
- Elliott, S. 1821. A sketch of the botany of South-Carolina and Georgia 1: 230.

Foliis peltato-reniformibus, subcrenatis, coriaceis; petiolis floriferis.
Leaves reniform, somewhat peltate, slightly crenate, coriaceous; petioles bearing the flowers.
Menyanthes trachysperma, Mich. 1. p. 126. Anonymos aquatica Walt. p. 109.
Root perennial. Stem properly 0. Leaves peltate, frequently orbicular, 3-4 inches in diameter, glabrous above, underneath purple, covered with vesicular points. Petioles very long, dotted, sometimes roughened. Flowers clustered, bursting from the petiole near the leaf. Peduncle about 2 inches long. Calyx deeply 5 parted, persistent, spotted; segments oblong, connivent after flowering. Corolla 1 petalled, white, marcescent, 5 cleft, tube shorter than the calyx, yellow, border twice as long; segments oblong, plaited in the middle, membranous along the margins. Filaments very short, inserted into the tube of the corolla. Anthers sagittate, erect, yellow. Nectaries 5, hairy, attached to the tube of the corolla by short pedicels attenuating with the filaments; hairs jointed, yellow. Germ superior, conic. Style very short. Stigma concave, (somewhat 2 lobed, Mich.) with the margins fimbriate. Capsule furrowed, 1 celled, 2 valved, sometimes 5? Seeds orbicular, compressed, roughened.
Grows in ponds and streams, sometimes found in water 6-8 feet deep. Flowers June.

Villarsia aquatica J.F.Gmel
- Gmelin, J.F. 1791. Systema Naturae. Tomus II (Botany). ed. 13. p. 447.

Cor. campanulata. Nectar. 5 stamina mentientia. Stil. 0. Caps. ovata, 1locularis polysperma.

Corolla campanulate. Nectaries five, reminiscent of stamens. Style null. Capsule ovate, unilocular, many-seeded.

Anonymos aquatica Walt.
- Walter, T. 1788. Flora Caroliniana. p. 108-109.

Calyx perianthium quinquepartitum, laciniis ovatis erectis. Cor. monopetala campanulata. Limbus 5-partitus, laciniis ovatis. Stam filamenta quinque brevia. Antherae luteae ovato oblongae, erectae. Nectaria totidem, filamenta alia mentientia, alternantia cum staminibus (filamentis brevibus antheris subrotundis). Pist. germen ovatum. Styli nulli. Stigmata duo membranacea, apice acuta. Per. capsula ovata supera, unilocularis. Sem. rotunda compressa villosa numerosa, receptaculis duobus oppositis affixa.

Calyx. Perianth five-parted. Lobes ovate, erect. Corolla monopetalous, campanulate. Limb five-parted, the lobes ovate. Stamen. Filaments five, short. Anthers yellow, ovate-oblong, erect. Nectaries just as many [five], the filaments reminiscent of the others [stamens], alternating with the stamens (with short filaments, subrotund anthers). Pistil. Ovary ovate. Style null. Stigmas two, membranaceous, the apex acute. Per. Capsule ovate, superior, unilocular. Seeds round, compressed, villous, numerous, affixed on two opposite receptacles.

Foliis peltato-reniformibus, coriaceis, subtus punctatis, supra glabris; petiolis sublongis teretibus glandulosis floriferis; floribus numerosis pedicellatis aggregatis albis.

Leaves peltate-reniform, coriaceous, punctate beneath, glabrous above. Petioles sublong, thin, glandulose, floriferous. Flowers numerous, pedicellate, aggregated, white.