⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-17806004, with some changes.
This name is a synonym of Umbellularia californica (Hook. & Arn.) Nutt..
The record derives from Tropicos which reports it as a synonym (record 17806004) with original publication details: Syst. Laur. 465 465 1836.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:467732-1.