Ceanothus L.

Ceanothus is an American genus and counts ca. 58 species ranging from the U.S.A. to Central America (Schmidt & Wilken 2016). The genus is most diverse in the western U.S.A. with 42 species endemic to California. Most species have colourful inflorescences and at least 39 are cultivated as ornamentals in Europe (McKean 1997). Hybridisation frequently occurs, in the wild as well as in cultivation. One (notho-)species, probably the most popular in cultivation, has been recorded as an outcast. Ceanothus xdelileanus, a hybrid of C. americanus L. and C. coeruleus Lag. 


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Jeong S.-C., Liston A. & Myrold D.D. (1997) Molecular phylogeny of the genus Ceanothus (Rhamnaceae) using rbc L and ndh F sequences. Theoretical and Applied Genetics 94(6-7): 852-857.

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Schmidt C.L. & Wilken D.H. (2016) Ceanothus. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 12. Oxford University Press, New York-Oxford. [available online at: http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=105966]

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Van Rensselaer M. & McMinn H.E. (1942) Ceanothus. Santa Barbara Botanic Garden, Santa Barbara: 308 p.

Taxonomic name: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith