Both Nymphaea

Nymphaea alba vs Nymphaea odorata

These two are not on this page because a keyword tool suggested them. They are here because our own identification model genuinely mistook one for the other, on real photographs, 14 times. We publish the rate, and then we tell you what actually separates them.

Confused 14x by our model Same genus Nymphaea Method published

Side by sidefigs. a and b

Nymphaea alba, photographed by Derek Winterburn
fig. a Derek Winterburn, CC BY 4.0

Nymphaea alba

European White Waterlily
Nymphaea odorata, photographed by Lynn Harper
fig. b Lynn Harper, CC0 1.0

Nymphaea odorata

American white waterlily

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Nymphaea alba Nymphaea odorata 14 of 20 (70%)

The confusion runs one way only. The model mistakes Nymphaea alba for Nymphaea odorata, but not the reverse.

Measured on 38,299 openly licensed, research-grade photographs. Full method and dataset.

What actually separates themon the record

Family Both Nymphaeaceae. The family does not separate them.
Genus Both Nymphaea. Congeners, which is why this is hard.
Flowering Peaks in June versus July. If the plant is in flower, timing helps. (n = 1,083 and 4,739.)

What we do not have yet: the diagnostic morphological character that a botanist would key on, from a source we can cite. We are not going to invent one. Until we have it, this page tells you the two are genuinely confusable, how often, and what the taxonomy and the flowering data do and do not settle.

Both recordsfull pages