⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2706905, with some changes.

Ceanothus thyrsiflorus var. griseus Trel. is a synonym of Ceanothus griseus (Trel. ex B.L.Rob.) McMinn

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Syn. Fl. N. Amer. 1(1): 415 1897.