Contains 9 accepted taxa overall.

Characteristics
Nymphaea L.
WATERLILY
Classification
NYMPHAEALES
Nymphaea
Citation
NYMPHAEA Linnaeus, Sp. Pl. 510. 1753, nom. cons.
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TYPE: Nymphaea alba Linnaeus, typ. cons.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Nymphaea ampla DOTLEAF WATERLILY Native OBL (NWPL) OBL (DEP)
Nymphaea capensis var. zanzibariensis CAPE BLUE WATERLILY Not Native OBL (NWPL) OBL (DEP)
Nymphaea elegans TROPICAL ROYALBLUE WATERLILY Native OBL (NWPL) OBL (DEP)
Nymphaea jamesoniana JAMESON'S WATERLILY; NIGHTBLOOMING WATERLILY Native Endangered-State OBL (NWPL) OBL (DEP)
Nymphaea lotus WHITE EGYPTIAN LOTUS Not Native OBL (NWPL) OBL (DEP)
Nymphaea mexicana YELLOW WATERLILY Native OBL (NWPL) OBL (DEP)
Nymphaea odorata AMERICAN WHITE WATERLILY Native OBL (NWPL) OBL (DEP)
Nymphaea x daubenyana Not Native OBL (NWPL) OBL (DEP)
Nymphaea x thiona Native OBL (NWPL) OBL (DEP)
[Family identification key]
1.  Leaf blade margins strongly sinuate-dentate
2
1.  Leaf blade margins entire or nearly so
4
2.  Plant pubescent; flowers opening at night (closing around noon)
2.  Plant glabrate; flowers opening during the day
3
3.  Leaf blade underside with pronounced nearly straight cross veins between the main veins near the petiole; sepals with conspicuous short darkened lines on the outer surface (apart from the veins); petals white
3.  Leaf blade underside without pronounced cross veins near the petiole, or these somewhat reticulate; sepals uniformly colored, without darkened lines or these inconspicuous (veins sometimes darker); petals blue to purple
4.  Leaf blade underside with pronounced cross veins between the main veins, especially near the petiole; flowers opening at night (closing around noon)
4.  Leaf blade underside without cross veins or with subtle cross veins between the main veins; flowers opening during the day
5
5.  Petals violet to nearly white; sepals with conspicuous short darkened lines on the outer surface
5.  Petals yellow to white; sepals uniformly colored, without darkened lines or these inconspicuous (veins sometimes darker)
6
6.  Plant stoloniferous and rhizomatous; leaf blades usually 7-12 cm wide; petals yellow
6.  Plant only rhizomatous, not stoloniferous; leaf blades usually 9-25 cm wide; petals white or mostly so
Genus Synonyms
Synonym Full Citation Basionym Type
Castalia Castalia Salisbury, Ann. Bot. (Koenig & Sims) 2: 71. 1805, nom. rej. TYPE: = Nymphaea Linnaeus 1753
Leuconymphaea Leuconymphaea Kuntze, Revis. Gen. Pl. 1: 11. 1891. TYPE: = Nymphaea Linnaeus 1753.