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Populus heteromorpha

Angiospermae - Malpighiales - Salicaceae

Taxonomy
Populus heteromorpha was named by Knowlton (1926). It is not extant. Its type locality is Cut No. 1, Spokane, Portland & Seattle Railway, which is in a Miocene fluvial shale in the Latah Formation of Washington.

Sister species lacking formal opinion data
P. acuminatafolia, P. aspensis, P. gallowayi, P. tengchongensis, P. tremula, P. wilmattae