This name is a synonym of Populus trichocarpa Torr. & A.Gray ex Hook..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50298246) with original publication details: Fl. Calif. 1: 346 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:208355-2.
This name was in version 1 of The Plant List, record tro-50298246.