Orchidaceae and Caprifoliaceae

Calypso bulbosa vs Linnaea borealis

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, 3 times. We publish the rate, and then we tell you what actually separates them.

Confused 3x by our model Method published

Side by sidefigs. a and b

Calypso bulbosa, photographed by Ellyne Geurts
fig. a Ellyne Geurts, CC0 1.0

Calypso bulbosa

Fairy-slipper
Linnaea borealis, photographed by steve b
fig. b steve b, CC0 1.0

Linnaea borealis

Twinflower

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Calypso bulbosa Linnaea borealis 3 of 20 (15%)

The confusion runs one way only. The model mistakes Calypso bulbosa for Linnaea borealis, but not the reverse.

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

What actually separates themon the record

Family Orchidaceae versus Caprifoliaceae. Different families, which is a real separation.
Genus Calypso versus Linnaea.
Flowering Peaks in May versus June. If the plant is in flower, timing helps. (n = 6,599 and 3,418.)

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