Chenopodiaceae and Asteraceae

Atriplex canescens vs Baccharis pilularis

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

Confused 4x by our model Method published

Side by sidefigs. a and b

Atriplex canescens, photographed by Andrew Tree
fig. a Andrew Tree, CC BY 4.0

Atriplex canescens

Fourwing Saltbush
Baccharis pilularis, photographed by Amthinkia
fig. b Amthinkia, CC0 1.0

Baccharis pilularis

coyote brush

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Atriplex canescens Baccharis pilularis 4 of 15 (27%)

The confusion runs one way only. The model mistakes Atriplex canescens for Baccharis pilularis, but not the reverse.

Measured on 38,949 openly licensed, research-grade photographs. Full method and dataset.

What actually separates themon the record

Family Chenopodiaceae versus Asteraceae. Different families, which is a real separation.
Genus Atriplex versus Baccharis.
Flowering Peaks in June versus October. If the plant is in flower, timing helps. (n = 207 and 3,230.)

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