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Montana Field Guides

Rocky Mountain Maple - Acer glabrum

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Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:

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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).

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).

Summary of Observations Submitted for Montana
Number of Observations: 215

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Relative Density

Recency

 

(Records associated with a range of dates 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
  • Literature Cited AboveLegend:   View WorldCat Record   View Online Publication
    • Lesica, P. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.
  • Additional ReferencesLegend:   View WorldCat Record   View Online Publication
    Do you know of a citation we're missing?
    • Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized). Agriculture Handbook No. 541. U.S. Forest Service, Washington, D.C. 375 pp.
  • Web Search Engines for Articles on "Rocky Mountain Maple"
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Citation for data on this website:
Rocky Mountain Maple — Acer glabrum.  Montana Field Guide.  Montana Natural Heritage Program.  Retrieved on December 19, 2014, from http://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PDACE01050
 
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