⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-29100442, with some changes.
This name is a synonym of Philadelphus microphyllus subsp. argenteus (Rydb.) C.L. Hitchc..
The record derives from Tropicos which reports it as a synonym (record 29100442) with original publication details: N. Amer. Fl. 22(2): 171-172 171 1905.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:192758-2.