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Lyonothamnus floribundus
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Island Ironwood
( Lyonothamnus floribundus )
Lyonothamnus floribundus
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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18 Nurseries Carry This Plant
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About Island Ironwood (Lyonothamnus floribundus)
18 Nurseries Carry This Plant
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Island Ironwood (
Lyonothamnus floribundus
) is a native tree that grows in Southern and Central California, primarily in the Channel Islands region. It tends to grow in rocky slopes, at elevations from 100-1600 feet. Lyonothamnus is endemic to the Channel Islands of California, where it grows in the chaparral and oak woodlands of the rocky coastal canyons.
This is a tree growing up to 15 metres (49 ft) tall with peeling reddish gray or brown bark. The evergreen leaves are shiny, dark green with lighter undersides, and borne on short petioles. The two subspecies have leaves of different leaf shapes. Ssp. asplenifolius (Santa Cruz Island Ironwood) has incised, fern-like leaves and is the more commonly available in horticultural form. Ssp. floribundus (Catalina Island Ironwood) has smooth, undivided leaves and is seldom seen in gardens. The inflorescence of both is a cluster of woolly white flowers with many short, whiskery stamens. The fruit is a pair of hard follicles.
Plant Description
Plant Type
Tree
Size
25 - 50 ft tall
15 - 24 ft wide
Form
Upright Columnar
Growth Rate
Fast
Dormancy
Evergreen
Fragrance
None
Flower Color
Cream, White
Flowering Season
Spring, Summer
Wildlife Supported
Numerous birds and insects are attracted to the flowers
Butterflies & moths hosted ( 1
confirmed
)
SHOW ALL
Western Avocado Leafroller Moth
Amorbia cuneana
Amorbia cuneana
Landscaping Information
Sun
Full Sun
Moisture
Very Low
Summer Irrigation
Max 1x / month once established
Nurseries
Carried by 18
Cold Tolerance
Tolerates cold to 22° F
Soil Drainage
Fast, Medium
Soil Description
This tree is tolerant of a variety of garden soils as long as drainage is reasonably good. Soil PH: 5.0 - 8.0
Common uses
Bank Stabilization, Hedges
Companion Plants
Use with other island species such as Catalina
Island Manzanita
(
Arctostaphylos catalinae
),
Santa Cruz Island Buckwheat
(
Eriogonum arborescens
),
St. Catherine's Lace
(
Eriogonum giganteum
), Redflower Bucksheat (
Eriogonum grande
var. rubescens),
Tree Poppy
(
Dendromecon harfordii
),
Giant Coreopsis
(
Leptosyne gigantea
),
Catalina Cherry
(
Prunus ilicifolia
ssp. lyonii),
Island Hazardia
(
Hazardia cana
) and
Island Bristleweed
(Hazardia dentonsa)
Propagation
?
For propagating by seed: Place seeds in about 6 times their volume of 140°F wa ter then let cool about 45 mins. before sowing ( Maunsell Van Rensselaer correspondence to Howard McMinn 1947). No treatment. gives fair germination.
Natural Setting
Site Type
Rocky slopes
Climate
Annual Precipitation: 4.0" - 90.9", Summer Precipitation: 0.14" - 4.24", Coldest Month: 8.7" - 58.5", Hottest Month: 32.5" - 87.4", Humidity: 1.19" - 38.76", Elevation: -480" - 13935"
Alternative Names
Common Names
: Catalina Ironwood
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Island Ironwood
Lyonothamnus floribundus
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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