''Ceanothus caeruleus'' is a species of ''

Ceanothus ''Ceanothus'' is a genus of about 50–60 species of Actinorhizal plant, nitrogen-fixing shrubs and small trees in the buckthorn family (Rhamnaceae). Common names for members of this genus are buckbrush, California lilac, soap bush, or just ceano ...

'' shrub first described by

Mariano Lagasca y Segura Mariano Lagasca y Segura (1776–1839), also known as Mariano la Gasca, was a Spanish botanist, writer and doctor. He was the director of the ''Real Jardín Botánico de Madrid'' (Royal Botanical Garden of Madrid). Early life Mariano Lag ...

. ''Ceanothus caeruleus'' is part of the genus ''

'' and the family

Rhamnaceae The Rhamnaceae are a large family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family. Rhamnaceae is included in the order Rosales. The family contains about 55 genera and 950 species. The Rhamnaceae h ...

References

Lag., 1816 ''In: Gen. et Sp. Nov. 11'' World Plants: Synonymic Checklists of the Vascular Plants of the World
/ref> {{Taxonbar, from=Q15268917 caeruleus