Circaea lutetiana vs Tiarella trifoliata
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.
Side by sidefigs. a and b
Circaea lutetiana
Tiarella trifoliata
How often our model gets it wrong measured, not estimated
| When the plant was | The model said | How often |
|---|---|---|
| Circaea lutetiana | Tiarella trifoliata | 3 of 20 (15%) |
The confusion runs one way only. The model mistakes Circaea lutetiana for Tiarella trifoliata, but not the reverse.
Measured on 38,949 openly licensed, research-grade photographs. Full method and dataset.
What actually separates themon the record
| Family | Onagraceae versus Saxifragaceae. Different families, which is a real separation. |
|---|---|
| Genus | Circaea versus Tiarella. |
| Flowering | Peaks in July versus July. Timing does not separate them. (n = 958 and 5,476.) |
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.