Juniperus virginiana

Juniperus virginiana
Eastern Juniper foliage and mature cones Eastern Juniper foliage and mature cones
Conservation status
File:Status iucn2.3 LC.svg Least Concern
Scientific classification
Kingdom: Plantae Division: Pinophyta Class: Pinopsida Order: Pinales Family: Cupressaceae Genus: Juniperus Species: J. virginiana
Binomial name
Juniperus virginiana L.

Juniperus virginiana is a widespread North American species of juniper, known as Eastern Juniper or Eastern Red Cedar (although it is not closely related to the true cedars, genus Cedrus); the Lakota Native American name is Chansha, "redwood" or Hante'. It is found from southeastern Canada to the Gulf of Mexico, east of the Great Plains. Further west, it is replaced by the related Juniperus scopulorum (Rocky Mountain Juniper), and to the southwest, Juniperus ashei (Ashe Juniper).

File:Juniper8346.JPG

Eastern Juniper trees

Eastern Juniper is a dense slow-growing tree that may never become more than a bush on poor soil but is ordinarily from 5-18 m tall, rarely 25 m, with a short trunk from 30-60 cm (1-2 feet) in diameter, rarely 120 cm (4 feet) diameter. The largest trees, on bottomlands in southeastern states of the USA, can be 300 years old. The bark is reddish-brown, fibrous, and peels off in narrow strips. The leaves are of two types; sharp, spreading needle-like juvenile leaves 5-10 mm long, and tightly adpressed scale-like adult leaves 2-4 mm long. The juvenile leaves are found on young plants up to 1-3 years old, and as scattered shoots on adult trees, usually in shade. The cones are 3-7 mm long, berry-like with fleshy scales, dark purple-blue with a white wax cover giving an overall sky-blue color (though the wax often rubs off); they are mature in 6-8 months. The 'berries' furnish winter food for many birds, which disperse the wingless seeds.

This species is a host for Apple rust disease. The Eastern Juniper is a pioneer invader, which means that it is one of the first trees to repopulate cleared, eroded, or otherwise damaged land. The tree can often be found along highways and near recent construction sites.

Juniperus virginiana is commonly found in prairies or oak barrens, old pastures, or limestone hills.

There are two subspecies, which intergrade where they meet:

• Juniperus virginiana subsp. virginiana. Eastern Juniper / Redcedar. Eastern North America, from Maine west to southern Ontario and South Dakota, south to northernmost Florida and southwest into the post oak savannah of east-central Texas. Cones larger, 4-7 mm; scale leaves acute at apex; bark red-brown.
• Juniperus virginiana subsp. silicicola. Southern or Sand Juniper / Redcedar. Along the Atlantic and Gulf coasts from North Carolina south to central Florida and west to southeast Texas. Cones smaller, 3-4 mm; scale leaves blunt at apex; bark orange-brown. It is treated by some authors at the lower rank of variety, while others treat it as a distinct species.

Uses

The fine-grained, soft brittle pinkish red to brownish red heartwood is fragrant, very light and very durable, even in contact with soil. If correctly prepared, it makes excellent English style longbows, flatbows, and Native American type sinewed bows. It was once a premier wood for pencils. Because the wood is naturally resistant to rot and is avoided by moths it is in demand as lining for clothes chests and closets, often referred to as cedar closets and cedar chests. The same rot resistance lends to the wood being used for fence posts. The wood is marketed as "eastern redcedar" or "aromatic cedar".

Juniper oil is distilled from the wood, twigs and leaves. The cones are used to flavor gin and as a kidney medicine.

Native American tribes used juniper wood poles to mark out agreed tribal hunting territories. French traders named Baton Rouge, Louisiana (meaning "red stick") from the reddish color of these poles.

During the dust bowl drought in the 1930s, the Prairie States Forest Project encouraged farmers to plant shelterbelts (wind breaks) made of Eastern Juniper throughout the Great Plains. While they are still planted for this purpose, in many areas the trees are considered an invasive species even in areas where they are native. Previously controlled by periodic wildfires, the trees are destructive to grasslands if left unchecked, and are actively being eliminated by cutting and prescribed burning[1]. The trees also burn very readily, and dense populations were blamed for the rapid spread of wildfires in drought stricken Oklahoma and Texas in 2005 and 2006[2].

In the Missouri and Arkansas Ozarks, Eastern Junipers (known locally as cedars) are commonly used as christmas trees.

Allergen

The pollen of Eastern Juniper is a known allergen, although not as potent as that of the related Juniperus ashei (Ashe Juniper) which sheds pollen a month earlier. People allergic to one are usually allergic to both. Eastern Juniper sheds pollen as early as late winter and through early spring. Consequently, what begins as an allergy to Ashe Juniper in the winter, may extend into spring since the pollination of the Eastern Juniper follows after that of the Ashe Juniper.

Contact with the Eastern Juniper leaves or wood can produce a mild skin rash in some individuals.

References

• Template:IUCN2006

External links

• Ohio Department of Natural Resources
• US Department of Transportation - Dust Bowl Lessons
• Juniperus virginiana images at bioimages.vanderbilt.edu