SelecTree: Tree Detail
Lyonothamnus floribundus subsp. asplenifolius
Photo Locations: UC Davis Arboretum - Davis, CA, UC Berkeley Botanic Gardens, Cal Poly Campus - San Luis Obispo, CA, San Marcos Growers - Santa Barbara, CA and Santa Barbara Botanic Garden - Santa Barbara, CA
Needs good drainage. Attractive in groves. The species floribundus is lobed and does not have leaflets.
Native to California.
A Lyonothamnus floribundus subsp. asplenifolius in Woodside is registered as a California Big Tree. It measures 45 feet high, with a trunk circumference of 61 inches and a crown spread of 40 feet.
Additional Common Names
CATALINA IRONWOOD, SANTA CRUZ IRONWOOD, FERN-LEAF IRONWOOD, ISLAND IRONWOOD
Conical or Oval Shape.
Has Evergreen foliage.
Height: 50 - 60 feet.
Width: 40 feet.
Growth Rate: 24 Inches per Year.
Longevity 50 to 150 years.
Leaves Pinnatifid, Dark Green, No Change, Evergreen.
Flowers Showy. White. Flowers in Summer. Has perfect flowers (male and female parts in each flower).
Brown Capsule, Small (0.25 - 0.50 inches), fruiting in Fall.
Bark Striking, Light Gray or Red Brown, Exfoliating, Smooth or Striated.
Shading Capacity Rated as Moderate to Dense in Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 14 - 17 and 19 - 24.
USDA Hardiness Zones 8 - 10.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Loam or Sand Texture.
Highly Acidic to Slightly Alkaline Soil pH.
Salinity Tolerance is Moderate on Coast.
Seaside Tolerance is Good in Moderate Zone.
Pests & Disease Information
Susceptible to Aphids.
Health, Safety & Environmental Concerns
Branch Strength Rated as Strong.
Root Damage Potential Rated as Moderate.
None Known Health Hazard.
Biogenic Emissions considered Low.
Special Uses & Values
Cite this tree:
SelecTree. "Lyonothamnus floribundus subsp. asplenifolius Tree Record." 1995-2019. Apr 18, 2019.
< https://selectree.calpoly.edu/tree-detail/lyonothamnus-floribundus-asplenifolius >
SelecTree Nursery Connection Map
Cal Poly / ESRI