Juniperus communis var. montana

Aiton

Hort. Kew. 3: 414. 1789.

Endemic
Synonyms: Juniperus communis subsp. alpina (Smith) Celakovsky Juniperus communis subsp. nana (Willdenow) Syme Juniperus communis var. jackii Rehder Juniperus communis var. saxatilis Pallas Juniperus sibirica
Treatment appears in FNA Volume 2.

Shrubs spreading to matlike, 0.5–1 m. Leaves upturned or upcurled, to 15 × 2 mm, linear-lanceolate, sometimes almost overlapping, glaucous stomatal band on adaxial leaf surface 2 or more times width of each green marginal band, apex acute to obtuse and mucronate. Seed-cones 6–9 mm, shorter than leaves. 2n = 22.


Habitat: Dry rocky soil and rock crevices on slopes and summits
Elevation: 0–2500 m

Distribution

Greenland, B.C., Calif., Oreg., Wash.

Discussion

Juniperus communis var. montana is widespread throughout the Northern Hemisphere. Although the proposed var. jackii is quite distinct in the field (prostrate shrub with sparsely branched, whiplike, trailing branches), transplants indicate that the unusual growth form is environmentally induced (Steve Edwards, pers. comm.).

Selected References

None.

Lower Taxa

None.

not +  and visible +
Mucronate (?) +, Acute (?) +  and Obtuse (?) +
Robert P. Adams +
long-lived +
exfoliating +
ascending;spreading +
inconspicuous +  and undifferentiated +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
globose +  and ovoid +
depressed +
Greenland +, B.C. +, Calif. +, Oreg. +  and Wash. +
0–2500 m +
Dry rocky soil and rock crevices on slopes and summits +
decurrent +  and scale-like +
petioled +, sessile +, twisted +  and simple +
overlapping +
green but sometimes appearing silver +
persisting +
0mm +  and 15mm +
3 (?) +  and 5 (?) +
linear-lanceolate +
2 width of each green marginal band +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
spheric;oblong +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
fibrous;woody +
peltate +  and complex +
cuneate +  and oblong +
fleshy +  and woody +
overlapping +
persistent +
coalesced +
fibrous +  and obscurely woody +
1 +  and 2 +
2 +  and 3 +
round +  and faceted +
flattened +
Juniperus communis subsp. alpina +, Juniperus communis subsp. nana +, Juniperus communis var. jackii +, Juniperus communis var. saxatilis +  and Juniperus sibirica +
Juniperus communis var. montana +
Juniperus communis +
variety +
flattened +, angled +  and terete +
shrub +  and matlike +
asymmetric +  and symmetric +