⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-47877, and has not been changed.
This name is a synonym of Corylus cornuta subsp. californica (A.DC.) A.E.Murray.
The record derives from WCSP which reports it as a synonym (record 47877) with original publication details: Phytologia 15: 420 1967.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:66434-2.