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Montana Field Guide

Montana Field Guides

Rocky Mountain Juniper - Juniperus scopulorum

Global Rank: G5
State Rank: S5
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

State Rank Reason (see State Rank above)
See rank details
  • Details on Status Ranking and Review
    Rocky Mountain Juniper (Juniperus scopulorum) Conservation Status Review
    Review Date = 05/24/2012
    View State Conservation Rank Criteria
    Population Size

    Score0 - Large: Generally >100,000 individuals.

    Range Extent

    Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

    Area of Occupancy

    Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score0 - Low: Species is a generalist that occurs in a variety of habitats and/or is tolerant of disturbed or degraded habitats (C -Values of 1-4).


    Score0 - Stable or Increasing: Population size, range, and/or available habitat stable, increasing or fluctuating in the recent past (approximately 30 years).


    Score0 - Low: Impacts, if any, to the species are expected to be minor or insignificant (affecting <10% of populations) in severity, scope and immediacy.

    Intrinsic Vulnerability

    Score0 - Low Vulnerability: Species does not have any unusual or specific life history or biological attributes or limted reproductive potential which makes it susceptible to extirpation from stochastic events or other adverse impacts to its habitat and thus slow to recover.

    Raw Conservation Status Score

    Score 0 total points scored out of a possible 19.

General Description
Erect shrub or small tree up to ca. 6 m with ascending branches and a conical crown. Bark stringy, reddish-brown. Leaves green but often with a whitish, glaucous coat, opposite, scale-like, appressed, 1–2 mm long, entire-margined with an acute but not apiculate tip; juvenile leaves needle-like, 2–6 mm long and ascending. Seed cones with 1 to 2 seeds, blue with glaucous bloom, 3–6 mm long, maturing in 2 years (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Across most of MT; BC and AB south to NV, AZ, and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 297

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



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

Stream terraces, open Douglas-fir or ponderosa pine forest, and rocky or barren slopes; plains, valleys to montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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Citation for data on this website:
Rocky Mountain Juniper — Juniperus scopulorum.  Montana Field Guide.  .  Retrieved on , from