Conocephalaceae and Lunulariaceae

Conocephalum conicum vs Lunularia cruciata

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

Confused 11x by our model Method published

Side by sidefigs. a and b

Conocephalum conicum, photographed by Jerry Lanfear
fig. a Jerry Lanfear, CC BY 4.0

Conocephalum conicum

Great Scented Liverwort
Lunularia cruciata, photographed by Randal
fig. b Randal, CC0 1.0

Lunularia cruciata

Crescent-cup liverwort

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Conocephalum conicum Lunularia cruciata 11 of 19 (58%)

The confusion runs one way only. The model mistakes Conocephalum conicum for Lunularia cruciata, but not the reverse.

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

What actually separates themon the record

Family Conocephalaceae versus Lunulariaceae. Different families, which is a real separation.
Genus Conocephalum versus Lunularia.

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