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Mason's Ceanothus
Ceanothus masonii
  
About Mason's Ceanothus (Ceanothus masonii) 0 Nurseries Carry This Plant 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. 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.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
6.6 ft tall

Dormancy
Dormancy
Evergreen

Flower Color
Flower Color
Blue, Purple

Wildlife Supported
 


Landscaping Information
Common uses
Common uses
Bank Stabilization, Butterfly Gardens, Bee Gardens

Natural Setting
Climate
Climate
Annual Precipitation: 23.5" - 66.6", Summer Precipitation: 0.29" - 1.10", Coldest Month: 38.6" - 50.8", Hottest Month: 64.2" - 70.6", Humidity: 0.67" - 17.28", Elevation: 35" - 3366"

Alternative Names
Common Names: Bolinas Ceanothus


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


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