⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50321168, with some changes.
This name is a synonym of Phlox douglasii subsp. rigida (Benth.) Wherry.
The record derives from Tropicos which reports it as a synonym (record 50321168) with original publication details: Prodr. 9: 306 306 1845.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:193650-2.