| Name | Ceanothus thyrsiflorus var. griseus Trelease |
| Authorship | Trelease |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Ceanothus thyrsiflorus Eschscholtz |
| GUID | urn:lsid:ipni.org:names:50784-2 |
| Citation | 1897 Syn. Fl. N. Amer. 1(1): 415 |
| Holdings | 16 Specimens held in the Harvard University Herbaria identified as Ceanothus thyrsiflorus var. griseus Trelease |
| Identification made in | [no date] (16) |
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