⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-28300966, and has not been changed.
This name is a synonym of Populus purdomii var. rockii (Rehder) C.F. Fang & H.L. Yang.
The record derives from Tropicos which reports it as a synonym (record 28300966) with original publication details: J. Arnold Arbor. 13(4): 386-387 386 1932.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:50922401-1.