Both Polypodiaceae

Dendroconche scandens vs Polypodium glycyrrhiza

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

Dendroconche scandens, photographed by Mike Bowie
fig. a Mike Bowie, CC BY 4.0

Dendroconche scandens

Fragrant Fern
Polypodium glycyrrhiza, photographed by Loopy30
fig. b Loopy30, CC BY-SA 4.0

Polypodium glycyrrhiza

licorice fern

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Dendroconche scandens Polypodium glycyrrhiza 3 of 16 (19%)

The confusion runs one way only. The model mistakes Dendroconche scandens for Polypodium glycyrrhiza, 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 Polypodiaceae. The family does not separate them.
Genus Dendroconche versus Polypodium.

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