Juniperus communis var. montana

Shrubs procumbent, to 70 cm; branchlets densely arranged, 3-angled, thick, ca. 2 mm in diam. Leaves in whorls of 3, ascending, lanceolate or linear, usually subfalcate, 4-10 × 1-2 mm, slightly concave adaxially with a single white stomatal band broader than green marginal bands, keeled abaxially, base jointed, not decurrent. Pollen cones axillary, subglobose or ellipsoid, 3-5 mm; microsporophylls 9-12, each with 3-6 pollen sacs. Seed cones brownish black when ripe, glaucous, globose or subglobose, 4-7 mm in diam. Seeds 1-3 per cone, 3-4 mm.

Juniperus communis var. montana Aiton:
Canada (North America)
Greenland (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Juniperus communis var. saxatilis Pall.:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Juniperus sibirica Burgsd.:
South Korea (Asia)
China (Asia)
Mongolia (Asia)
Russian Federation (Asia)
Japan (Asia)
United States (North America)
Greenland (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Heilongjiang, Jilin, Liaoning, Nei Mongol, Xinjiang, Xizang [Korea, Japan, Mongolia, Russia (Far East, Siberia); C and W Asia to W Himalaya, Europe, W North America]

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Global Range: Juniperus communis var. charlottensis occurs from Calvert Island (north of Vancouver Island) to Queen Charlotte Island, and on several islands and coastal mainland areas north to Chichagof Island, Alaska.

Juniperus communis Linnaeus var. montana Aiton (1789), not Neilreich (1859); J. communis var. nana (Willdenow) Baumgarten; J. communis var. saxatilis Pallas; J. nana Willdenow.

Comments: This variety only grows on serpentine or lava (ultramafic rocks) but also can be found at high elevation on this substrate (Adams 2008).

Comments: This variety grows on muskeg or sphagnum bogs at low-lying areas near the ocean (Adams 2008).

Mountain areas; 600-4200 m.

Foodplant / pathogen
erumpent apothecium of Colpoma juniperi infects and damages live twig of Juniperus nana
Remarks: season: 5-7

Foodplant / saprobe
hysteroid apothecium of Lophodermium juniperinum is saprobic on dead leaf of Juniperus nana
Remarks: season: 8-10

Foodplant / pathogen
erumpent apothecium of Colpoma juniperi infects and damages live twig of Juniperus communis ssp. alpina
Remarks: season: 5-7

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: Unknown

The following is a representative barcode sequence, the centroid of all available sequences for this species.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 5
Species With Barcodes: 1

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 4
Species With Barcodes: 1

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: T1 - Critically Imperiled

Reasons: This variety is only found in the Siskiyou Mountains of northwestern California and southwestern Oregon. It grows on very specific areas (ultramafic rocks) and can also be found at high elevation (Mt. Hood, Oregon). Little is known of about populations numbers but this variety is limited to a very narrow area in the mountains and only on specific substrate.

Canada

Rounded National Status Rank: N3 - Vulnerable

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: T3 - Vulnerable

Reasons: This variety is described as distinctive in by Adams (Phytologia 2008). It is restricted to muskeg bogs (atypical of Juniperus communis) on coastal islands and the mainland coast of British Columbia and Alaska. Adams in his book Junipers of the World (2008) outlines this variety growing in very specific areas and likely threatened by habitat degradation.

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: T4 - Apparently Secure