The Monumental Trees database also reports trees of 1.2 to 1.5 m girth growing in Latvia, Poland, and the Netherlands, with measurements from 2013 to 2015. A 2016 measurement of a tree at Albero del Poeta, Italy, found a girth of 2.6 m (Monumental Trees 2017), and this is the largest current reliable record. at breast-height." Due to the age and lack of detail in that record, it must be treated as doubtful at this time. Salomonson (1999) reported that the largest tree "is found at Råå in the province of Närke. Points plotted as tree icons represent isolated or approximate locations. North American (including Iceland and Greenland) distribution data from USGS (1999). Hardy to Zone 3 (cold hardiness limit between -39.9☌ and -34.4☌) ( Bannister and Neuner 2001, variety not specified). Among other places, it is native to Croatia Sweden and the United States. This is the most widespread conifer in the world, native to temperate Eurasia, and North America N of Mexico, occupying an extraordinary range of habitats ( Farjon 2005). Seed cones maturing in 2 years, of 2 distinct sizes, with straight peduncles, globose to ovoid, 6-13 mm, bluish black, glaucous, resinous to obscurely woody, with 2-3 seeds. Leaves green but sometimes appearing silver when glaucous, spreading, abaxial glands very elongate adaxial surface with glaucous stomatal band apex acute to obtuse, mucronate. Branches spreading or ascending branchlets erect, terete. Bark brown, fibrous, exfoliating in thin strips, that of small branchlets (5-10 mm diam.) smooth, that of larger branchlets exfoliating in strips and plates. "Shrubs or small trees dioecious, to 4 m (if trees, to 10 m), multistemmed, decumbent or rarely upright crown generally depressed. A major study, including chemical characters, is needed to clarify the taxonomy" (Adams 1993). " Juniperus communis is the most widespread juniper species, and many subspecies and varieties have been described. nipponica (no further description provided at this time) communis (no further description provided at this time) This treatment follows Farjon (2005) in recognizing five varieties, but he cautions that further study is needed, and that variation within populations is comparable to the differences described between the varieties. Thus, the observed morphological differences are for the most part explainable on the basis of habitat differences, chiefly climate. Many infraspecific taxa have been described in this highly polymorphic species, but most are sympatric, or merge into each other where they meet. Ĭommon juniper, Siberian juniper, dwarf juniper genévrier commun, enebro común gaagaagiwaandag . Plant forming a mat in the depauperate understory of a shady Pinus ponderosa forest at Devils Tower, Wyoming. Regeneration is often asexual, by means of runners. This is a naturally regenerated plant in habitat. Ī tree, about 5 m tall, at Burnham Beeches. įoliage and mature seed cones on a plant at Burnham Beeches, west of London, UK. Ī plant growing above timberline with Pinus albicaulis on Mt. įoliage and mature seed cones on a subalpine plant at Sunwapta Pass, Alberta. Ī plant growing on exposed granitic rocks near the sea, Vinalhaven, Maine. Ī large plant growing with Abies concolor near Navajo Lake, Utah. Ĭones and foliage on the specimen shown above. Relict populations can be found in the Atlas Mountains of Africa.A specimen in Sierra Nevada National Park, Spain, elev. It has the largest geographical range of any woody plant, with a circumpolar distribution throughout the cool temperate Northern Hemisphere from the Arctic south in mountains to around 30°N latitude in North America, Europe and Asia. Juniperus communis, the common juniper, is a species of conifer in the genus Juniperus, in the family Cupressaceae.
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