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Abies concolor

(Balsam Fir)

Overview

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Beautiful form with intense silvery-blue needles . Often grafted on species understock.

A handsome dwarf form with an irregular habit and blue needles.

A dwarf form (to 3' tall) with needles that are borne densely and bluish-green in color.

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Balsam Fir, Colorado Fir, Concolor Fir, Rocky Mountain White Fir, Silver Fir, White Balsam, White Fir

Common Names in German:

Grautanne

Common Names in Spanish:

Pino Real Blanco

Description

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Family Pinaceae

Trees or rarely shrubs , evergreen or deciduous, monoecious. Branchlets often dimorphic : long branchlets with clearly spirally arranged , sometimes scalelike leaves; short branchlets often reduced to slow growing lateral spurs bearing dense clusters of leaves at apex. Leaves solitary or in bundles of (1 or) 2-5(-8) when basally subtended by a leaf sheath ; leaf blade linear or needlelike, not decurrent. Cones unisexual . Pollen cones solitary or clustered, with numerous spirally arranged microsporophylls ; microsporophyll with 2 microsporangia; pollen usually 2-saccate (nonsaccate in Cedrus, Larix, Pseudotsuga, and most species of Tsuga) . Seed cones erect or pendulous, maturing in 1st, 2nd, or occasionally 3rd year, dehiscent or occasionally indehiscent, with many spirally arranged ovulate scales and bracts; ovulate scales usually smaller than bracts at pollination, with 2 upright ovules adaxially, free or only basally adnate with bracts, maturing into seed scales. Seed scales appressed , woody or leathery, variable in shape and size, with 2 seeds adaxially, persistent or deciduous after cone maturity. Bracts free or adnate basally with seed scales, well developed or rudimentary , exserted or included . Seeds terminally winged (except in some species of Pinus) . Cotyledons 2-18. Germination hypogeal or epigeal. 2n = 24* (almost always) .

Ten or eleven genera and ca. 235 species: N hemisphere; ten genera (two endemic) and 108 species (43 endemic, 24 introduced ) in China.

Species of the Pinaceae are among the most valuable and commercially important plants in the world. Most species are trees, and are often excellent sources of lumber, wood products, and resins; many are cultivated for afforestation and as ornamentals .[1]

Genus Abies

Trees evergreen , crown usually spirelike to conic, sometimes flat to round topped in age. Bark initially thin, smooth , bearing resin blisters, in age furrowed and/or flaking in plates . Branches whorled , irregular internodal branches occasionally produced by epicormic sprouting (growing from a dormant bud) ; short (spur) shoots absent; leaf scars prominent , ± circular to broadly elliptic , flush with twig surface, slightly depressed , or slightly raised evenly all around. Buds ovate or oblong , resinous or not, apex rounded or pointed . Leaves borne singly, persisting 5 or more years, spirally arranged but often proximally twisted so as to appear either 1-ranked (pointing up like toothbrush bristles ) or 2-ranked, sessile, typically constricted and often twisted above the somewhat broadened base , sheath absent; leaves on vegetative branches flattened, frequently grooved adaxially, usually notched to rounded at apex; leaves on fertile branches sometimes appearing 4-sided, upright, sharp-pointed to rounded at apex; resin canals 2. Cones borne on year-old twigs . Pollen cones grouped, ovate or oblong-cylindric, leaving gall-like protuberances after falling, yellow to red, green, blue, or purple. Seed cones maturing in 1 season , erect , ovoid to oblong-cylindric or cylindric , not falling whole but scale by scale, cone axis persisting as an erect "spike" on branch ; scales shed individually, fan-shaped, lacking apophysis and umbo; bracts included to exserted. Seeds winged , the wing-seed juncture bearing resin sac; cotyledons 4--10. x =12.

Species ca. 42: widespread in north temperate regions , North America, Mexico, Central America, Eurasia (s to Himalayas, s China, and Taiwan), n Africa.

In Abies several traditionally accepted species have closely allied sibling species , e.g. , A. balsamea -- A. fraseri, A. bifolia -- A. lasiocarpa, and A. magnifica -- A. procera. Other species may be more distinct morphologically, but many of these still appear to have evolved in geographic isolation without strong reproductive barriers developing. Thus, when distributions of species overlap, introgression between the taxa is the rule ; this may make it difficult to assign certain individuals to a species. In the interests of nomenclatural stability , I have accepted the taxa recognized by the U.S. Forest Service (E.L. Little Jr. 1979). This classification does not recognize varieties based on variations in bract characteristics but recognizes species that perhaps would be treated as varieties in other conifer genera. The only exceptions to this treatment are some necessary changes within A. concolor and A. lasiocarpa. Cases of introgression are discussed under the taxa involved. Some distinct or possibly distinct geographic populations deserve further study and may warrant future taxonomic recognition.

Most North American firs are major components of vegetation, especially in the boreal, Pacific Coast coniferous , and western montane coniferous forests, where they are important for watershed management . They are cut for pulpwood and lumber and, largely from plantations, for Christmas trees . All our species, especially Abies concolor, and several exotics are grown---some more than others---as ornamentals . Firs provide cover , and their leaves are important as food, for various birds and mammals. Species of Abies frequently have a pleasant odor; their foliage has been used as a stuffing material for pillows . Most commercial products with "pine odors" are in fact scented with essential oils distilled from Abies foliage by Russian farmers. A similar oil could be derived from balsam fir in North America.[2]

Physical Description

Species Abies concolor

Trees to 40m; trunk to 0.9m diam.; crown spirelike. Bark gray, thin, smooth , with age thickening (to 18cm) and breaking into deep longitudinal furrows , often revealing yellowish inner periderm , appearing "corky." Branches diverging from trunk at right angles , the lower often spreading and drooping in age; twigs mostly opposite, glabrous or with yellowish pubescence . Buds exposed, either yellowish and nearly conic (when large) or brownish and nearly globose (when small), resinous , apex rounded to pointed ; basal scales equilaterally triangular, glabrous, not resinous, margins entire, apex sharp-pointed. Leaves 1.5--6cm ´ 2--3mm, mostly 2-ranked, flexible , proximal portion ±straight; cross section flat, sometimes slightly grooved adaxially; odor pungent , frequently camphorlike; abaxial surface glaucous, with 4--7 stomatal rows on each side of midrib ; adaxial surface grayish green, glaucous, with (7--) 12(--18) stomatal rows at midleaf, these usually fewer toward leaf apex; apex usually rounded, sometimes acute or notched ; resin canals small, near margins and abaxial epidermal layer. Pollen cones at pollination ± red, purple, or ± green. Seed cones cylindric , 7--12 ´ 3--4.5cm, olive-green, sessile, apex round ; scales ca. 2.5--3 ´ 3--3.5cm, pubescent ; bracts included . Seeds 8--12 × 3mm, body tan; wing about twice as long as body, tan with rosy tinge; cotyledons 5--7. 2 n =24. [source]

Abies concolor is a western catchall species for firs with green seed cones and with glaucous adaxial leaf surfaces. Many of these populations have long been isolated geographically and genetically. A geographic cluster of populations in Utah has shorter leaves and slightly different terpene patterns than a similar cluster of populations in Colorado and northern New Mexico (J.W. Wright et al. 1971; E.Zavarin et al. 1975). Another large geographic cluster, in southern New Mexico and Arizona, seems to be strongly linked chemically to Colorado populations (E.Zavarin et al. 1975) and morphologically to southern California populations (J.L. Hamrick and W.J. Libby 1972). Northern California populations with pubescent twigs and notched leaves are unique, as are the Baja California populations with very short, thick leaves and about 18 adaxial stomatal rows. In Los Padres National Forest of coastal southern California and in the Cascades of northern California, apparent introgression with A. lowiana (E.Zavarin et al. 1975; J.L. Hamrick and W.J. Libby 1972) has occurred. Many consider A. lowiana (given specific rank in this treatment) as a synonym of A. concolor or place it in an infraspecific rank under that species. [source]

ID Features: Two-ranked needles in a V-shape. New stems covered with gray hairs. Circular leaf scars. Smooth bark with resin blisters. Notched needle tip. Resinous buds.

Habit: pyramidal in shape , holding a dense, formal shape well, even with age • Growth Form: Single StemShape and Orientation: Conical

Flowers: No ornamental value. Monoecious. • Bloom Period: Late SpringFlower Color: inconspicuous, none • Flower Conspicuous: No

Seeds: Seed per Pound: 15920 • Seed Spread Rate: Moderate • Seedling Vigor: Medium • Fruit: Brown resinous cones. Cones shatter soon after maturing. Cones typically found only in upper third of the canopy . 3" to 4" long. • Fruit/Seed Abundance: Medium • Fruit/Seed Color: Brown • Fruit/Seed Conspicuous: No • Cold Stratification Required: Yes

Foliage: Foliage Color: Green • Summer foliage: Needles are variable, up to 1" long. 2 lateral sets of leaves arranged horizontally, V-shaped parting between. sets. Leaf tip is notched . Dark, shiny green with 2 white stomatal lines on underside. Buds are resinous . • Fall foliage: No fall color (evergreen ). • Foliage Porosity Summer: Dense • Foliage Porosity Winter: Dense • Foliage Texture: Medium • Fall Conspicuous: No • Leaf Retention: Yes

Size/Age/Growth

Active Growth Period: Spring and Summer • Growth Rate: Slow to medium growth rateMature Height (feet): 180.0 • Maximum Height at 20 Years (feet): 20 • Size: 50' to 75' tall by 20' to 30' wide, but can reach over 100' tall • Vegetative Spread Rate: None • Lifespan: Lifespan

Landscaping

Landscape Uses: Specimen tree . Widely used as Christmas tree . Bird and animal shelter . • Liabilities: Loses nice "Christmas tree " shape with age. Problem pests and diseases include: spruce budworm, woolly aphid, and. several cankers . Often performs poorly under landscape conditions. Often damaged by deer.

Habitat

Coniferous forests ; 1700--3400m. [source]

On better sites fully stocked, unmanaged stands of white fir may yield up to 150,000 board feet per acre at age 100. Thinning white fir stands periodically will salvage trees which would be lost to natural mortality. Pruning is not ordinarily recommended for white fir because of its tendency for epicormic sprouting and unless the tree is being grown for veneer or finish lumber, there is not need for this practice.Young trees are easily killed by fire and must be protected from this hazard. Young sapling and pole sized trees are subject to sunscald when exposed suddenly, and thinnings should be light because of this. White fir is more prone to windthrow than ponderosa pine because of its more shallow, wide spreading root system , and care should be taken in partial cuttings to leave buffer strips against the wind and to thin conservatively.White fir Christmas trees require 6 to 9 years to produce a 6 foot tree. They need cultivation or other treatment to prevent excessive competition from grass . Excessive leader growth will need to be controlled by basal pruning, basal scarring or pruning of the terminal shoot . Leader growth should be kept to about 12 inches.

Typically found at an altitude of 0 to 2,793 meters (0 to 9,163 feet).[3]

Biology

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Reproduction

Duration: PerennialCoppice Potential: No • Progagated by Bulbs: No • Propagated by Bare Root: Yes • Propagated by Container: Yes • Propagated by Corms: No • Propagated by Cuttings: Yes • Propagated by Seed: Yes • Propagated by Sod: No • Propagated by Sprigs: No • Propagated by Tubers: No • Fruit/Seed Period Begin: Summer • Fruit/Seed Period End: FallFruit/Seed Persistence: No

Growth

Culture: Easily transplanted because of shallow root system . Prefers cold climates. Well-drained, acidic soil. Dislikes heat and dry air . Not well-adapted to cultivation.

Soil: Adapted to Medium Textured: Adapted to Medium Textured Soils • Adapted to Coarse Textured Soils: Yes • Anaerobic Tolerance: None • Salinity Tolerance: None • CaCO3 Tolerance: Low • Minimum pH: 5.5 • Maximum pH: 7.8 • Fertility Requirement: Medium

Sunlight: Sun Exposure: Sun to Partial Shade. • Shade Tolerance: Tolerant

Moisture: Drought Tolerance: Medium • Minimum Precipitation: 18 • Maximum Precipitation: 80 • Moisture Use: Medium

Temperature: Minimum Temperature (F): -38 • Minimum Frost Free Days: 80 • Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b. (map)

Taxonomy

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Synonyms

Abies concolor f. atroviolacea Cinovskis • Abies concolor lowiana (Gordon) E. Murray • Abies concolor var. bajacalifornica Silba • Abies concolor var. lowiana (Gordon) Lemmon • Abies concolor var. martinezii Silba • Abies grandis var. concolor A. Murray Bis • Abies grandis var. lowiana (Gordon) Hoopes • Abies lowiana (Gordon) A. Murray Bis • Abies lowiana var. viridula Debreczy & Rcz • Picea concolor Gordon • Picea concolor Gordon & Glend. • Picea lowiana Gordon • Pinus concolor (Gordon) Parl.

Similar Species

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Members of the genus Abies

ZipcodeZoo has pages for 115 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

A. alba (European Silver Fir) · A. alba f. pendula (European Silver Fir) · A. alba 'Green Spiral' (European Silver Fir) · A. amabilis (Beautiful Fir) · A. balsamea (Balsam Fir) · A. balsamea fraseri (Balsam Fir) · A. balsamea f. hudsonia (Hudsonia Dwarf Silver Fir) · A. balsamea lasiocarpa (Subalpine Fir) · A. balsamea var. nana (Dwarf Balsam Fir) · A. balsamea x sibirica (Balsam Fir) · A. beshanzuensis (Baishan Fir) · A. borisii-regis (King Boris Fir) · A. bracteata (Bristlecone Fir) · A. cephalonica (Greek Fir) · A. cephalonica 'Meyer's Dwarf' (Greek Fir) · A. chensiensis (Shensi Fir) · A. chensiensis chensiensis (Shensi Fir) · A. chensiensis salouenensis (Salween Fir) · A. cilicica (Cilician Fir) · A. concolor (Balsam Fir) · A. concolor var. concolor (White Fir) · A. concolor 'Candicans' (Colorado Fir) · A. concolor 'Gables Weeping' (Gable's Weeping Colorado Fir) · A. concolor 'Green Globe' (Colorado Fir) · A. concolor 'Rockford' (Colorado Fir) · A. delavayi (Delavay's Fir) · A. delavayi fansipanensis (Fansipan Fir) · A. delavayi var. delavayi (Delavay's Silver Fir) · A. delavayi var. motuoensis (Medoc Fir) · A. delavayi var. nukiangensis (Nukiang Fir) · A. densa (Sikkim Fir) · A. fabri (Fabers Fir) · A. fargesii (Farges' Fir) · A. fargesii var. sutchuensis (Farges´ Fir) · A. firma (Japanese Fir) · A. forrestii (Forrest's Fir) · A. forrestii var. georgei (George's Fir) · A. fraseri (Fraser Fir) · A. fraseri 'Franklin' (Fraser Fir) · A. fraseri 'Julian Potts' (Fraser Fir) · A. fraseri 'Klein' (Fraser Fir) · A. grandis (Giant Fir) · A. grandis var. grandis (Grand Fir) · A. grandis x concolor (Giant Fir) · A. guatemalensis (Guatemalan Fir) · A. guatemalensis var. guatemalensis (Guatemalan Fir) · A. holophylla (Manchurian Fir) · A. homolepis (Nikko Fir) · A. homolepis var. homolepis (Nikko Fir) · A. kawakamii (Taiwan Fir) · A. koreana (Korean Fir) · A. koreana 'Aurea' (Golden Korean Fir) · A. koreana 'Gelbbunt' (Korean Fir) · A. koreana 'Goldener Traum' (Golden Korean Fir) · A. koreana 'Horstmann's Silberlocke' (Korean Fir) · A. koreana 'Piccolo' (Fir) · A. koreana 'Prostrate Beauty' (Korean Fir) · A. koreana 'Silberperl' (Korean Fir) · A. koreana 'Silber Mavers' (Korean Fir) · A. koreana 'Silver Show' (Korean Fir) · A. koreana 'Starkers Dwarf' (Korean Fir) · A. lasiocarpa (Alpine Fir) · A. lasiocarpa arizonica var. arizonica (Cork Bark Fir) · A. lasiocarpa var. arizonica (Corkbark Fir) · A. lasiocarpa x homolepis (Balsam Fir) · A. lasiocarpa 'Arizona Compacta' (Cork-Bark Fir) · A. lasiocarpa 'Duflon' (Alpine Fir) · A. lasiocarpa 'Green Globe' (Alpine Fir) · A. magnifica (California Red Fir) · A. magnifica 'Prostrata' (California Red Fir) · A. nebrodensis (Sicilian Fir) · A. nephrolepis (Manchurian Fir) · A. nordmanniana (Caucasian Fir) · A. nordmanniana equi-trojani (Kazdagi Fir) · A. nordmanniana nordmanniana (Bornmuellers Fir) · A. nordmanniana 'Golden Spreader' (Caucasian Fir) · A. nordmanniana 'Tortifolia' (Caucasian Fir) · A. numidica (Algerian Fir) · A. numidica de (Algerian Silver Fir) · A. phanerolepis (Fir) · A. pindrow (Pindrow Fir) · A. pinsapo (Spanish Fir) · A. pinsapo var. pinsapo (Spanish Fir) · A. pinsapo 'Aurea' (Golden Spanish Fir) · A. pinsapo 'Glauca' (Blue Spanish Fir) · A. procera (Noble Fir) · A. procera 'Blau Hexe' (Noble Fir) · A. procera 'Blue Spire' (Fir) · A. procera 'Frijsenborg' (Noble Fir) · A. procera 'Glauca' (Noble Fir) · A. procera 'Glauca Prostrata' (Noble Fir) · A. procera 'La Graciosa' (Noble Fir) · A. procera 'Robustifolia' (Noble Fir) · A. procera 'Sherwoodii' (Noble Fir) · A. procera 'Silver' (Fir) · A. recurvata (Min Fir) · A. recurvata var. ernestii (Chien-Lu Fir) · A. recurvata var. recurvata (Min Fir) · A. religiosa (Sacred Fir) · A. sachalinensis (Sakhalin Fir)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal February 28, 2008:

Identifiers

Footnotes

  1. Liguo Fu, Nan Li, Thomas S. Elias & Robert R. Mill "Pinaceae". in Flora of China Vol. 4 Page 11. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. Richard S. Hunt "Abies". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  3. Mean = 1,252.510 meters (4,109.285 feet), Standard Deviation = 768.660 based on 243 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 2012-05-02