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Lyonothamnus floribundus ssp. floribundus (Catalina ironwood)
Wasowski, Sally and Andy

Lyonothamnus floribundus ssp. floribundus

Lyonothamnus floribundus A. Gray ssp. floribundus

Catalina Ironwood, Santa Catalina Island Ironwood

Rosaceae (Rose Family)



USDA Native Status: L48 (N)

The genus name, meaning "Lyon's shrub," honors the discoverer, William Scrugham Lyon (1852-1916), a U.S. horticulturist and forester.


From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Tree
Leaf Retention: Evergreen
Leaf Arrangement: Opposite
Leaf Complexity: Simple
Leaf Shape: Linear , Oblong
Leaf Margin: Crenate , Entire
Inflorescence: Panicle
Fruit Type: Aggregate , Follicle
Size Notes: Up to about 50 feet tall.
Fruit: Aggregated follicles.

Bloom Information

Bloom Color: White
Bloom Time: May , Jun


Native Distribution: South Channel Islands (Santa Catalina Island), California, endemic. Threatened by feral animals.
Native Habitat: Rocky slopes, canyons, oak woodland, chaparral, 65'-1625'.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Santa Barbara Botanic Garden - Santa Barbara, CA


Bibref 7 - Jepson Manual: Higher Plants of California (1993) Hickman, J.C. (ed.)
Bibref 995 - Native Landscaping from El Paso to L.A. (2000) Wasowski, S. and A. Wasowski

Search More Titles in Bibliography

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Lyonothamnus floribundus ssp. floribundus in USDA Plants
FNA: Find Lyonothamnus floribundus ssp. floribundus in the Flora of North America (if available)
Google: Search Google for Lyonothamnus floribundus ssp. floribundus


Record Modified: 2023-05-10
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