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Montana Field Guide

Montana Field Guides

Rocky Mountain Maple - Acer glabrum


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Large monoecious or dioecious, shrubs or small trees up to 15 m. Twigs glabrous, red to purple. Leaves ovate-cordate, glabrous, 3–12 cm across, 3- to 5-lobed, doubly serrate; petioles red. Inflorescence a few-flowered panicle on short leafy side shoots. Flowers functionally unisexual; sepals and petals 3–4 mm long, yellowish, distinctly veined; stamens 8 to 10. Samara 2–4 cm long, the seed ca. 5 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AK to AB south to CA, NM, NE. AK to AB south to CA, NM, and NE (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 247

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Moist, open, coniferous forest, riparian forests, avalanche slopes; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Rocky Mountain Maple — Acer glabrum.  Montana Field Guide.  .  Retrieved on , from