⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-12303779, and has not been changed.
This name is a synonym of Rhododendron maddenii subsp. crassum (Franch.) Cullen.
The record derives from Tropicos which reports it as a synonym (record 12303779) with original publication details: Bull. Soc. Bot. France 34: 282 282 1887.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:332255-1.