⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2706689, with some changes.
This name is a synonym of Ceanothus thyrsiflorus Eschw..
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Ill. Hort. 7: t. 268 1860.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:716808-1.