Fraser fir

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Fraser fir
Abies fraseri cone.jpg
Foliage and cone
Status TNC G2.svg
Imperiled  (NatureServe) [2]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Pinaceae
Genus: Abies
Section: Abies sect. Balsamea
Species:
A. fraseri
Binomial name
Abies fraseri
Abies fraseri range map 2.png
Natural range of Abies fraseri
Abies fraseri range map 4.png
Close-up of natural range of Abies fraseri
Synonyms [3]
  • Abies humilisBach.Pyl.
  • Picea fraseri(Pursh) Loudon
  • Picea hudsoniaGordon
  • Pinus fraseriPursh

The Fraser fir, sometimes spelled" Frasier fir, (Abies fraseri) is an endangered species of fir native to the Appalachian Mountains of the Southeastern United States. They are endemic to only seven montane regions in the Appalachian Mountains. [4]

Contents

Taxonomy

Abies fraseri is closely related to Abies balsamea (balsam fir), of which it has occasionally been treated as a subspecies (as A. balsamea subsp. fraseri (Pursh) E.Murray) or a variety (as A. balsamea var. fraseri (Pursh) Spach). [5] [6] [7] [8] Some botanists regard the variety of balsam fir named Abies balsamea var. phanerolepis as a natural hybrid with Fraser fir, denominated Abies × phanerolepis (Fernald) Liu. [6]

Names

Fraser fir on the slopes of Clingmans Dome Fraser Fir.JPG
Fraser fir on the slopes of Clingmans Dome

The species Abies fraseri is named after the Scottish botanist John Fraser (1750–1811), who made numerous botanical collections in the region. [6] It is sometimes spelled "Frasier," "Frazer" or "Frazier."

In the past, it was also sometimes known as "she-balsam" because resin could be "milked" from its bark blisters, [9] in contrast to the "he balsam" (or Picea rubens, the red spruce) which could not be milked. It has also occasionally been called balsam fir, inviting confusion with A. balsamea. [10]

Description

Close-up view of Fraser fir foliage FraserFirFoliage.jpg
Close-up view of Fraser fir foliage

Abies fraseri is a small evergreen coniferous tree typically growing between 30 and 50 ft (10 and 20 m) tall, but rarely to 80 ft (20 m), with a trunk diameter of 16–20 in (41–51 cm), but rarely 30 in (80 cm). The crown is conical, with straight branches either horizontal or angled upward at 40° from the trunk; it is dense when the tree is young and more open in maturity. The bark is thin, smooth, grayish brown, and has numerous resinous blisters on juvenile trees, becoming fissured and scaly in maturity.

The leaves are needle-like; arranged spirally on the twigs but twisted at their bases to form two rows on each twig;[ clarification needed ] they are 10–23 mm (3878 in) long and 2–2.2 mm (564332 in) broad; flat; flexible; rounded or slightly notched at their apices (tips); dark to glaucous green adaxially (above); often having a small patch of stomata near their apices; and having two silvery white stomatal bands abaxially (on their undersides). Their strong fragrance resembles that of turpentine.

The cones are erect; cylindrical; 3.5–7 cm (1+122+34 in) long, rarely 8 cm (3+14 in), and 2.5–3 cm (1–1+18 in) broad, rarely 4 cm (1+12 in) broad; dark purple, turning pale brown when mature; often resinous; and with long reflexed green, yellow, or pale purple bract scales. The cones disintegrate when mature at 4–6 months old to release the winged seeds. [5] [6] [7]

Ecology

Reproduction and growth

Fraser fir is monoecious, meaning that both male and female cones (strobili) occur on the same tree. [11] Cone buds usually open from mid-May to early June. Female cones are borne mostly in the top few feet of the crown and on the distal ends of branches. Male cones are borne below female cones, but mostly in the upper half of the crown. Seed production may begin when trees are 15 years old. Seeds germinate well on mineral soil, moss, peat, decaying stumps and logs, and even on detritus or litter that is sufficiently moist. [12]

Distribution and habitat

Fraser fir forest, with many trees killed by balsam woolly adelgid Abies fraseri0.jpg
Fraser fir forest, with many trees killed by balsam woolly adelgid

Abies fraseri is restricted to the southeastern Appalachian Mountains in southwestern Virginia, western North Carolina and eastern Tennessee, where it occurs at high elevations, from 3,900 ft (1,200 m) to the summit of Mount Mitchell, the highest point in the region at 6,684 ft (2,037 m). It lives in acidic moist but well-drained sandy loam, and is usually mixed with Picea rubens (red spruce). Other trees it grows with include Tsuga caroliniana (Carolina hemlock), Betula alleghaniensis (yellow birch), Betula papyrifera (paper birch), and Acer saccharum (sugar maple). The climate is cool and moist, with short, cool summers and cold winters with heavy snowfall. [5] [6] It lives in sites that experience frequent cloud coverage, which, when paired with cooler temperatures, improves plant water status and high soil moisture. [13]

Pests

Abies fraseri can be severely damaged by a non-native insect, the balsam woolly adelgid (Adelges piceae) from Europe. The insect's introduction and spread led to a rapid decline in Fraser fir across its range, with over 80 percent of mature trees having been killed. The rapid regeneration of seedlings with lack of canopy has led to good regrowth of healthy young trees where the mature forests once stood.[ citation needed ] However, when these young trees get old enough for the bark to develop fissures, they may be attacked and killed by the adelgids as well.[ citation needed ]

For this reason, the future of the species was still uncertain, though the Mount Rogers (Virginia) population has largely evaded adelgid mortality. The decline of the Fraser fir in the southern Appalachians has contributed to loss of moss habitat which supports the endangered spruce-fir moss spider (Microhexura montivaga), an obligate of Fraser fir-red spruce stands. [8]

By the late 1990s, the adelgid population had decreased. While two-thirds of adult trees had been killed by the 1980s, a study of the Great Smoky Mountains National Park showed that as of 2020, the number of adult trees had increased over the previous 30 years, with three times as many on Clingmans Dome, Tennessee's highest peak. [14]

Threats

The Fraser fir is an endangered species. [15] Threats include climate change and the aforementioned balsam woolly adelgid.

Cultivation and uses

Although not important as a source of timber, the combination of dense natural pyramidal form, strong limbs, soft long-retained needles, dark blue-green color, pleasant scent and excellent shipping characteristics, has led to Fraser fir being widely used as a Christmas tree. [16] Fraser fir has been used more times as the White House Christmas tree than any other tree.[ citation needed ]

The Christmas decoration trade is a multimillion-dollar business in the southern Appalachians. North Carolina produces the majority of Fraser fir Christmas trees. [17] It requires from seven to ten years in the field to produce a 6–7-foot-tall (1.8–2.1-meter) tree. In 2005, the North Carolina General Assembly passed legislation making the Fraser fir the official Christmas tree of North Carolina.

The Fraser fir is cultivated from seedlings in several northern states in the USA and across the border in adjacent parts of the Canadian province of Quebec, especially for the Christmas tree trade. [15] It is also grown in Bedgebury National Pinetum and other collections in the United Kingdom. [15]

See also

Related Research Articles

<span class="mw-page-title-main">Fir</span> Genus of plants in the conifer family Pinaceae

Firs are evergreen coniferous trees belonging to the genus Abies in the family Pinaceae. There are approximately 48–56 extant species, found on mountains throughout much of North and Central America, Europe, Asia, and North Africa. The genus is most closely related to Cedrus (cedar).

<i>Picea mariana</i> North American species of spruce tree

Picea mariana, the black spruce, is a North American species of spruce tree in the pine family. It is widespread across Canada, found in all 10 provinces and all 3 territories. It is the official tree of the province of Newfoundland and Labrador and is that province's most numerous tree. The range of the black spruce extends into northern parts of the United States: in Alaska, the Great Lakes region, and the upper Northeast. It is a frequent part of the biome known as taiga or boreal forest.

<i>Picea abies</i> Species of plant

Picea abies, the Norway spruce or European spruce, is a species of spruce native to Northern, Central and Eastern Europe.

<i>Abies balsamea</i> Species of conifer tree

Abies balsamea or balsam fir is a North American fir, native to most of eastern and central Canada and the northeastern United States.

<span class="mw-page-title-main">Mount Rogers</span> Highest point in Virginia, United States

Mount Rogers is the highest natural point in Virginia, United States, with a summit elevation of 5,729 feet (1,746 m) above mean sea level. The summit straddles the border of Grayson and Smyth Counties, Virginia, about 6.45 miles (10.38 km) WSW of Troutdale, Virginia. Most of the mountain is contained within the Lewis Fork Wilderness, while the entire area is part of the Mount Rogers National Recreation Area, which itself is a part of the Jefferson National Forest.

<i>Magnolia fraseri</i> Species of tree

Magnolia fraseri, commonly known as Fraser magnolia, mountain magnolia, earleaf cucumbertree, or mountain-oread, is a species of magnolia native to the south-eastern United States in the southern Appalachian Mountains and adjacent Atlantic and Gulf Coastal Plain from West Virginia south to northern Florida and west to eastern Texas. The Appalachian plants are classified as Magnolia fraseri var. fraseri, and the more coastal plants as M. fraseri var. pyramidata. These two kinds of magnolia are often recognized as distinct species, M. fraseri and M. pyramidata, respectively.

<i>Abies concolor</i> Species of conifer tree

Abies concolor, the white fir, concolor fir, or Colorado fir, is a coniferous tree in the pine family Pinaceae. This tree is native to the mountains of western North America, including the Cascade Range and southern Rocky Mountains, and into the isolated mountain ranges of southern Arizona, New Mexico, and Northern Mexico. It naturally occurs at elevations between 900 and 3,400 metres.

<span class="mw-page-title-main">Spruce-fir moss spider</span> Species of spider

The spruce-fir moss spider is an endangered species of spider found at high elevations in the southern Appalachian Mountains. First identified in 1923, it inhabits moss that grows on rocks underneath the forest canopy.

<i>Picea rubens</i> Species of plant

Picea rubens, commonly known as red spruce, is a species of spruce native to eastern North America, ranging from eastern Quebec and Nova Scotia, west to the Adirondack Mountains and south through New England along the Appalachians to western North Carolina. This species is also known as yellow spruce, West Virginia spruce, eastern spruce, and he-balsam. Red spruce is the provincial tree of Nova Scotia.

<i>Abies magnifica</i> Species of tree found in North America

Abies magnifica, the red fir or silvertip fir, is a western North American fir, native to the mountains of southwest Oregon and California in the United States. It is a high-elevation tree, typically occurring at 1,400–2,700 metres (4,600–8,900 ft) elevation, though only rarely reaching tree line. The name red fir derives from the bark color of old trees.

<i>Abies sibirica</i> Species of conifer

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<span class="mw-page-title-main">Black Mountains (North Carolina)</span> Mountain range in western North Carolina, US

The Black Mountains are a mountain range in western North Carolina, in the southeastern United States. They are part of the Blue Ridge Province of the Southern Appalachian Mountains. The Black Mountains are the highest mountains in the Eastern United States. The range takes its name from the dark appearance of the red spruce and Fraser fir trees that form a spruce-fir forest on the upper slopes which contrasts with the brown or lighter green appearance of the deciduous trees at lower elevations. The Eastern Continental Divide, which runs along the eastern Blue Ridge crest, intersects the southern tip of the Black Mountain range.

<span class="mw-page-title-main">Abietoideae</span> Subfamily of the conifer family Pinaceae

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<span class="mw-page-title-main">Great Balsam Mountains</span> Mountain range in North Carolina, United States

The Great Balsam Mountains, or Balsam Mountains, are in the mountain region of western North Carolina, United States. The Great Balsams are a subrange of the Blue Ridge Mountains, which in turn are a part of the Appalachian Mountains. The most famous peak in the Great Balsam range is Cold Mountain, which is the centerpiece of author Charles Frazier's bestselling novel Cold Mountain.

<span class="mw-page-title-main">Richland Balsam</span> Mountain in North Carolina

Richland Balsam is a mountain in the Great Balsam Mountains in the U.S. state of North Carolina. Rising to an elevation of 6,410 feet (1,950 m), it is the highest mountain in the Great Balsam range, is among the 20 highest summits in the Appalachian range, and is the ninth highest peak in the Eastern United States. The Blue Ridge Parkway reaches an elevation of 6,053 feet (1,845 m)—the parkway's highest point—as it passes over Richland Balsam's southwestern slope. The Jackson County-Haywood County line crosses the mountain's summit.

<span class="mw-page-title-main">Southern Appalachian spruce–fir forest</span> Ecoregion of the southern Appalachian Mountains of the eastern United States

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<span class="mw-page-title-main">Balsam woolly adelgid</span> Insect that attacks fir trees

The balsam woolly adelgid is small wingless insect that infests and kills firs. In their native Europe they are a minor parasite on silver fir and Sicilian fir, but they have become a threat especially to balsam fir and Fraser fir after they were introduced to the United States around the beginning of the 20th century. Because this species is not native to North America, the Fraser fir has not evolved any type of defense against it.

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Syneta extorris is a species of leaf beetle. It is found in eastern North America.

References

  1. Farjon, A. (2013). "Abies fraseri". IUCN Red List of Threatened Species . 2013: e.T32101A2810241. doi: 10.2305/IUCN.UK.2013-1.RLTS.T32101A2810241.en . Retrieved 19 November 2021.
  2. "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 18 June 2022.
  3. "The Plant List: A Working List of All Plant Species" . Retrieved 3 October 2014.
  4. Kaylor, S. (September 2016). "Recovery Trends and Predictions of Fraser Fir (Abies fraseri) Dynamics in the Southern Appalachian Mountains". Canadian Journal of Forest Research. 47 (1): 125-133.
  5. 1 2 3 Farjon, A. (1990). Pinaceae. Drawings and Descriptions of the Genera. Koeltz Scientific Books ISBN   3-87429-298-3.
  6. 1 2 3 4 5 Liu, T.-S. (1971). A Monograph of the Genus Abies. National Taiwan University.
  7. 1 2 Flora of North America: Abies fraseri
  8. 1 2 Gymnosperm Database: Abies fraseri
  9. Frankenberg, D. (2000). Exploring North Carolina's Natural Areas: Parks, Nature Preserves, and Hiking Trails. Chapel Hill: University of North Carolina Press. ISBN   978-0-8078-4851-7. p343
  10. Sutton, M. & Sutton, A. (1985). Eastern forests (Audubon Society Nature Guides). New York: Knopf. ISBN   978-0-394-73126-1. p363
  11. Abies fraseri (Pursh) Poir Archived 2016-10-25 at the Wayback Machine , Silviculture Manual, Volume 1, US Department of Agriculture Forest Service, Retrieved 20 October 2014
  12. Abies fraseri (Pursh) Poir. Archived 2016-04-25 at the Wayback Machine The National Christmas Tree Association, Retrieved 20 Oct 2014
  13. Cory, S. T., Wood, L. K., & Neufeld, H. S. (2017). Phenology and growth responses of Fraser fir (Abies fraseri) Christmas trees along an elevational gradient, southern Appalachian Mountains, USA. Agricultural and Forest Meteorology, 243, 25–32. https://doi.org/10.1016/j.agrformet.2017.05.003
  14. McDarris, Anne (April 22, 2020). "Earth Day: After decades of devastation, a comeback for WNC forests". Asheville Citizen-Times . Retrieved April 22, 2020.
  15. 1 2 3 "Fraser Fir". Global Trees. Retrieved 2021-05-07.
  16. Hendrix, Steve, "A Christmas tree’s remarkable journey", The Washington Post, December 21, 2011.
  17. "Fraser Fir". North Carolina Department of Agriculture. Retrieved 24 November 2010.