⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50295594, with some changes.
This name is a synonym of Populus deltoides var. occidentalis Rydb..
The record derives from Tropicos which reports it as a synonym (record 50295594) with original publication details: Fl. Colorado 91 91 1906.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:776796-1.