Both Pinus

Pinus strobus vs Pinus sylvestris

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 Same genus Pinus Method published

Side by sidefigs. a and b

Pinus strobus, photographed by Pierre Cartier
fig. a Pierre Cartier, CC0 1.0

Pinus strobus

eastern white pine
Pinus sylvestris, photographed by Carol Ann Vermeer
fig. b Carol Ann Vermeer, CC BY 4.0

Pinus sylvestris

Scots pine

How often our model gets it wrong measured, not estimated

When the plant was The model said How often
Pinus sylvestris Pinus strobus 3 of 19 (16%)

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

What actually separates themon the record

Family Both Pinaceae. The family does not separate them.
Genus Both Pinus. Congeners, which is why this is hard.

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