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California Buttonbush
( Cephalanthus occidentalis )
Cephalanthus occidentalis
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
Click on blue squares to see occurrence records.
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About California Buttonbush (Cephalanthus occidentalis)
20 Nurseries Carry This Plant
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Cephalanthus occidentalis
is a species of flowering plant in the coffee family, Rubiaceae, that is native to the Central Valley in California, and to eastern and southern North America. Common names include Buttonbush, Common Buttonbush, Button-willow and Honey-bells. C. occidentalis is a deciduous shrub or small tree that averages 1-3 meter (3.3-9.8 feet) in height, but can reach 6 meter (20 feet). The leaves are opposite or in whorls of three, elliptic to ovate, 7-18 centimeter (2.8-7.1 inches) long and 4-10 meter (13-33 feet) broad, with a smooth edge and a short petiole. The flowers are arranged in a dense spherical flower cluster 2-3.5 centimeter (0.79-1.4 inches) in diameter on a short peduncle. Each flower has a fused white to pale yellow four-lobed corolla forming a long slender tube connecting to the sepals. The stigma protrudes slightly from the corolla. The fruit is a spherical cluster of achenes (nutlets).
This plant is easy to grow as long as it's planted near a stream or water source. Often used in wetland revegation project in the Central Valley.
Plant Description
Plant Type
Shrub
Size
3 - 20 ft tall
3 - 15 ft wide
Form
Upright, Rounded
Growth Rate
Fast, Moderate
Dormancy
Winter Deciduous
Flower Color
White, Cream
Flowering Season
Summer, Fall
Wildlife Supported
Waterfowl eat seeds, native bees attracted to flowers
Butterflies & moths hosted ( 3
likely
* )
SHOW ALL
*
Salt Marsh Moth or Acrea Moth
Estigmene acrea
Estigmene acrea
*
Common Eupithacia
Eupithecia miserulata
Eupithecia miserulata
*
Fall Webworm
Hyphantria cunea
Hyphantria cunea
Landscaping Information
Sun
Full Sun
Moisture
Moderate - High
Summer Irrigation
Keep moist
Nurseries
Carried by 20
Ease of Care
Very Easy
Cold Tolerance
Tolerates cold to 10 - 20° F
Soil Drainage
Fast, Medium, Slow
Soil Description
Tolerates a wide variety of soils and drainage types. Soil PH: 6 - 8
Common uses
Deer Resistant, Bird Gardens, Bee Gardens
Companion Plants
Fremont Cottonwood
(
Populus fremontii
),
Blue Elderberry
(
Sambucus nigra ssp. caerulea
),
Box Elder
(
Acer negundo
),
Coast Live Oak
(
Quercus agrifolia
),
Creek Dogwood
(
Cornus sericea
)
Propagation
?
For propagating by seed: No treatment.
Natural Setting
Site Type
Edges of lakes and streams
Climate
Annual Precipitation: 6.0" - 66.0", Summer Precipitation: 0.13" - 1.80", Coldest Month: 34.9" - 51.7", Hottest Month: 60.0" - 78.5", Humidity: 1.05" - 27.52", Elevation: -12" - 7967"
Alternative Names
Botanical Names
: Cephalanthus occidentalis var. californicus
Common Names
: Common Buttonbush
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California Buttonbush
Cephalanthus occidentalis
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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