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Alnus incana ssp. tenuifolia
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Mountain Alder
( Alnus incana ssp. tenuifolia )
Alnus incana ssp. tenuifolia
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Mountain Alder (Alnus incana ssp. tenuifolia)
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Mountain Alder (
Alnus incana
ssp. tenuifolia) is a native tree or shrub that grows in northern, southern and central California. It is fast growing and moderately long-lived. It grows in an upright form to a height of 20 feet, with active growth during the spring and summer. Flowers are purple and bloom in the early spring. Leaves are dark green and deciduous. It tends to grow in wet places, at elevations from 4500-8000 feet.
Plant Description
Plant Type
Tree
Size
20 ft tall
Form
Upright
Growth Rate
Fast
Dormancy
Winter Deciduous
Flower Color
Purple
Flowering Season
Spring
Wildlife Supported
Butterflies & moths hosted ( 124
likely
* )
SHOW ALL
*
Western Tiger Swallowtail
Papilio rutulus
Papilio rutulus
*
Pale Tiger Swallowtail
Papilio eurymedon
Papilio eurymedon
*
Mourning Cloak
Nymphalis antiopa
Nymphalis antiopa
*
Green Comma
Polygonia faunus
Polygonia faunus
*
Oreas Comma
Polygonia oreas
Polygonia oreas
*
White-lined Sphinx
Hyles lineata
Hyles lineata
*
Ceanothus Silkmoth
Hyalophora euryalus
Hyalophora euryalus
Landscaping Information
Sun
Full Sun, Part Shade
Moisture
Moderate - High
Nurseries
Carried by 5
Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.
Common uses
Bird Gardens
Sunset Zones
?
1*, 2*, 3*, 7*, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Natural Setting
Site Type
Wet places
Climate
Annual Precipitation: 11.0" - 122.1", Summer Precipitation: 0.18" - 4.10", Coldest Month: 10.0" - 51.8", Hottest Month: 33.4" - 79.6", Humidity: 0.33" - 30.17", Elevation: 261" - 13977"
Alternative Names
Common Names
: Thinleaf Alder
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Mountain Alder
Alnus incana ssp. tenuifolia
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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