Celastraceae and Rubiaceae

Euonymus fortunei vs Mitchella repens

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

Confused 5x by our model Method published

Side by sidefigs. a and b

Euonymus fortunei, photographed by Erin Lalime
fig. a Erin Lalime, CC BY 4.0

Euonymus fortunei

fortune's spindle
Mitchella repens, photographed by Jessica Turcotte
fig. b Jessica Turcotte, CC BY 4.0

Mitchella repens

partridgeberry

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Euonymus fortunei Mitchella repens 5 of 19 (26%)

The confusion runs one way only. The model mistakes Euonymus fortunei for Mitchella repens, but not the reverse.

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

What actually separates themon the record

Family Celastraceae versus Rubiaceae. Different families, which is a real separation.
Genus Euonymus versus Mitchella.
Flowering Peaks in August versus June. If the plant is in flower, timing helps. (n = 165 and 11,106.)

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