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Rocky Mountain Maple Back to Plant Page
Acer glabrum

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About Rocky Mountain Maple (Acer glabrum) Acer glabrum is a species of maple native to western North America, from southeastern Alaska, British Columbia and western Alberta, east to western Nebraska, and south through Washington, Montana and Colorado to California, Arizona and New Mexico. It is a small tree growing to 10 meters tall, with a trunk diameter up to 20-30 centimeters. The flowers are produced in corymbs of five to ten, yellowish-green, at the same time as the new leaves in spring. The fruit is a samara with two winged seeds.
Plant Description
Plant Type

Max. Height
15 - 32.8 ft (4.6 - 10 m)


Growth Rate

Flower Color
Green, Yellow

Flowering Season

Native Status

Natural Setting
Site Type
Spring-moist slopes and canyons

Part Shade

Elevation ?
97' - 13958'

Annual Precip. ?
5.3" - 155.6"

Summer Precip. ?
0.31" - 5.85"

Coldest Month ?
9.5° F - 53.9° F

Hottest Month ?
33.1° F - 78.9° F

Humidity ?
0.35 vpd - 31.07 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.

Landscaping Information
Ease of Care
Moderately Easy

Propagation ?
For propagating by seed: 6 mos. warm, then 6 mos. cold stratification (Heit 1971).

Common uses
Butterfly Gardens

Nursery Availability
Rarely Available


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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