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Santa Catalina Island Ironwood
Lyonothamnus floribundus ssp. floribundus
About Santa Catalina Island Ironwood (Lyonothamnus floribundus ssp. floribundus) 1 Nurseries Carry This Plant Lyonothamnus floribundus ssp. floribundus, the Santa Catalina Island Ironwood, is endemic to Santa Catalina Island, one of the Channel Islands in Southern California. The trees occur in small groves, with all trunks within a grove being clones representing a single genetic individual. There are only around 110 groves of Catalina ironwood remaining.

It is rare in cultivation, while the other Island Ironwood subspecies, Lyonothamnus floribundus ssp. asplenifolius, the Santa Cruz Island Ironwood, is more readily available and cultivated horticulturally. It is endemic to three of the Channel Islands: Santa Cruz Island, Santa Rosa Island, and San Clemente Island.
Plant Description
Plant Type
Plant Type



Flowering Season
Flowering Season
Spring, Summer

Wildlife Supported

Butterflies & moths hosted ( 1 likely * ) SHOW ALL

Landscaping Information

Natural Setting
Site Type
Site Type
The groves of Santa Catalina Island Ironwood are primarily found on the island's cool north-facing coastal slopes, often along small faults where they have greater access to water, and on sites with cold-air drainage. They are found in the Mixed Evergreen Forest, Foothill Woodland, and Chaparral plant communities of Catalina Island.

Annual Precipitation: 12.2" - 14.3", Summer Precipitation: 0.21" - 0.30", Coldest Month: 55.1" - 57.3", Hottest Month: 66.9" - 73.2", Humidity: 2.09" - 18.07", Elevation: -480" - 1868"

Alternative Names
Common Names: Catalina Ironwood

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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