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Abies balsamea

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Abies balsamea
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Scientific classification
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(L.) Mill.

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  • Pinus balsamea L.
  • Pinus taxifolia Salisb.
  • Abies balsamifera Michx.
  • Peuce balsamea (L.) Rich.
  • Abies hudsonia Bosc ex Jacques
  • Picea balsamea (L.) Loudon
  • Abies minor Duhamel ex Gordon
  • Picea aromatica Carrière

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Abies balsamea or balsam fir is a North American fir, native to most of eastern and central Canada (Newfoundland west to central British Columbia) and the northeastern United States (Minnesota east to Maine, and south in the Appalachian Mountains to West Virginia).[2]

Growth

Balsam fir is a small to medium-size evergreen tree typically Script error: No such module "convert". tall, rarely to Script error: No such module "convert". tall, with a narrow conic crown. The bark on young trees is smooth, grey, and with resin blisters (which tend to spray when ruptured), becoming rough and fissured or scaly on old trees. The leaves are flat needle-like, 15 to 30 millimetres (½–1 in) long, dark green above often with a small patch of stomata near the tip, and two white stomatal bands below, and a slightly notched tip. They are arranged spirally on the shoot, but with the leaf bases twisted to appear in two more-or-less horizontal rows. The cones are erect, 40 to 80 millimetres (1½–3 in) long, dark purple, ripening brown and disintegrating to release the winged seeds in September.

Varieties

There are two varieties:

  • Abies balsamea var. balsamea (balsam fir) – bracts subtending seed scales short, not visible on the closed cones. Most of the species' range.
  • Abies balsamea var. phanerolepis (bracted balsam fir or Canaan fir) – bracts subtending seed scales longer, visible on the closed cone. The southeast of the species' range, from southernmost Quebec to West Virginia. The name 'Canaan Fir' derives from one of its native localities, the Canaan Valley in West Virginia. Some botanists regard this variety as a natural hybrid between balsam fir and Fraser fir (Abies fraseri), which occurs further south in the Appalachian mountains.

Ecology

On mountain tops, stands of Balsam fir occasionally develop fir waves. Often found in association with Black Spruce, White Spruce and trembling aspen.

This tree provides food for moose, American red squirrels, crossbills and chickadees, as well as shelter for moose, snowshoe hares, white-tailed deer, ruffed grouse and other small mammals and songbirds. The needles are eaten by some lepidopteran caterpillars, for example the Io moth (Automeris io).

Uses

File:BalsamFirEssOil.png
Balsam fir (Abies balsamea) essential oil in clear glass vial

Both varieties of the species are very popular as Christmas trees, particularly in the northeastern United States. The resin is used to produce Canada balsam, and was traditionally used as a cold remedy and as a glue for glasses, optical instrument components, and for preparing permanent mounts of microscope specimens. The wood is milled for framing lumber (part of SPF lumber), siding and pulped for paper manufacture. Balsam fir oil is an EPA approved nontoxic rodent repellent. The balsam fir is also used as an air freshener and as incense.[3]

Prior to the availability of foam rubber and air mattresses; balsam fir boughs were a preferred mattress in places where trees greatly outnumbered campers. Many fir limbs are vertically bowed from alternating periods of downward deformation from snow loading and new growth reaching upward for sunlight. Layers of inverted freshly cut limbs from small trees created a pleasantly fragrant mattress lifting bedding off the wet ground; and the bowed green limbs were springs beneath the soft needles. Upper layers of limbs were placed with the cut ends of the limbs touching the earth to avoid uncomfortably sharp spots and sap.[4]

The cultivar A. balsamia 'Hudsonia group' (Hudson fir), has gained the Royal Horticultural Society's Award of Garden Merit.[5]

The Native Americans used it for a variety of medicinal purposes.[6]

Tree emblem

Balsam Fir is the Provincial tree of New Brunswick.

See also

References

  1. ^ Farjon, A. (2013). "Abies balsamea". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved May 2, 2014. 
  2. ^ "PLANTS Profile for Abies balsamea (balsam fir)". USDA PLANTS. Retrieved 2007-07-17. 
  3. ^ [1][dead link]
  4. ^ Thoreau, Henry David The Maine Woods Apollo edition (1966) Thomas Y. Crowell Company
  5. ^ "RHS Plant Selector Abies balsamea Hudsonia Group AGM / RHS Gardening". Apps.rhs.org.uk. Retrieved 2012-08-30. 
  6. ^ http://herb.umd.umich.edu/herb/search.pl?searchstring=Abies+balsamea

External links

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