Supriya Ghosh (Editor)

Ceanothus masonii

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Kingdom  Plantae
Family  Rhamnaceae
Scientific name  Ceanothus masonii
Rank  Species
Order  Rosales
Genus  Ceanothus
Higher classification  California lilac
Ceanothus masonii httpsuploadwikimediaorgwikipediacommonsthu
Similar  Ceanothus diversifolius, Ceanothus confusus, California lilac, Ceanothus jepsonii, Ceanothus divergens

Ceanothus masonii is a species of shrub in the buckthorn family, Rhamnaceae, known by the common name Mason's ceanothus. It is endemic to Marin County, California, where it is known only from an area near Bolinas on the Point Reyes National Seashore. It grows in the coastal chaparral on the windblown bluffs..


This rare shrub grows to heights approaching 2 meters. The evergreen leaves are oppositely arranged and less than 2 centimeters long. They are round to oval in shape and have tiny, sharp teeth along the edges, sometimes spine-tipped. The inflorescence is a small cluster of deep blue to purple flowers. The fruit is a capsule just a few millimeters wide, topped with minute horns. This ceanothus is closely related to Ceanothus gloriosus, and may in fact be a variety of that species.


Ceanothus masonii Wikipedia

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Ceanothus confusus
Ceanothus divergens
Ceanothus diversifolius