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Liquidambar styraciflua

(American Sweet Gum)

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in English:

Alligatorwood, American Sweet Gum, American Sweetgum, American-Storax, Red Gum, Red-Gum, Redgum, Satin-Walnut, Sweet Gum, Sweet-Gum, Sweetgum

Common Names in German:

Amberbaum, Amerikanischer Storaxbaum, Guldenbaum

Description

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Genus Liquidambar

Trees , aromatic and resinous , glabrous or with simple hairs . Bark gray-brown, deeply furrowed ; liquid, and Arabic ambar, amber] twigs and branches sometimes corky-winged. Dormant buds scaly , pointed , shiny, resinous, sessile. Leaves long-petiolate. Leaf blade fragrant when crushed, (3-) 5(-7) -lobed, palmately veined, base deeply cordate to truncate , margins glandular-serrate, apex of each lobe long-acuminate. Inflorescences terminal , many-flowered heads ; staminate heads in pedunculate racemes , each head a cluster of many stamens; pistillate heads pendent, long-pedunculate, the flowers ± coalesced . Flowers unisexual , staminate and pistillate on same plant, appearing with leaves; calyx and corolla absent. Staminate flowers : anthers dehiscing longitudinally; staminodes absent. Pistillate flowers pale green to greenish yellow; staminodes 5-8; styles indurate and spiny in fruit, incurved . Capsules many, fused at base into long-pedunculate, spheric, echinate heads, 2-beaked, glabrous, septicidal . Seeds numerous , mostly aborting, 1-2 viable in each capsule, winged . x = 16.

Species 3(-4) : North America, e Asia, and Turkey.[1]

Physical Description

Species Liquidambar styraciflua

Trees , to 41 m. Leaves : stipules linear-lanceolate, 3-4 mm, early deciduous, leaving 2 stipular scars adaxially near base of petiole ; petioles (44-) 60-100(-150) mm. Leaf blade palmately lobed , main lobes sometimes again dentate-lobed, 7-19(-25) × 4.4-16 cm; surfaces glabrous , except young leaves hairy on veins and main vein-axils at base with persistent reddish brown simple hairs . Staminate flowers in pedunculate clusters , 3-6 cm; perianth absent; stamens 4-8(-10) per flower, 150-176(-300) per cluster, falling after anthesis . Pistillate flowers without perianth; hypanthium disclike, with 5-8 staminodes around cycle of disc lobes; ovary (1-) 2-locular; styles 2; stigmas introrsely curved . Capsular heads brown at maturity, globose , 2.5-4 cm diam. (including indurate styles). Seeds apically winged , 8-10 mm, marked with resin ducts ; aborted seeds brownish, 1-2 mm, unwinged, irregular, resembling sawdust. 2 n = 32. Flowering spring (Mar-May). [source]

ID Features: Distinguish from maples because leaves are alternate. Aromatic foliage. Distinct shiny fruit balls. Star shaped pith. Relatively large terminal and flower buds. Corky ridges on stems (often absent). For young trees habit is distinctly pyramidal.

Habit: A deciduous shade tree . Pyramidal when young, oblong to rounded when mature . Usually maintains a single leader . • Growth Form: Single Stem • Shape and Orientation: Erect

Flowers: Monoecious. Yellowish-green in May. Not showy. • Bloom Period: Mid SpringFlower Color: chartreuse, yellow-green • Flower Conspicuous: Inconspicuous

Seeds: Seed per Pound: 82080 • Seed Spread Rate: Moderate • Seedling Vigor: High • Fruit: 1 to 1.5" spiny balls ; change from green to brown. Look like a mace weapon. Become noticeable in the late summer and fall . Persist in winter. • Fruit/Seed Abundance: Medium • Fruit/Seed Color: Brown • Fruit/Seed Conspicuous: Yes • Cold Stratification Required: Yes

Foliage: Maple-like, 3-7 lobed , deep green, glossy • Foliage Shape: OvateFoliage Color: Green • Normal foliage color: Green • Underside foliage: Green • Juvenile foliage: Green • Mature foliage: Green • New foliage: Green • Spring foliage: Green • Summer foliage: Alternate "maple-like" star shaped leaves. Leaves are 5- to 7- lobed , 4 to 8" long and wide. Margins serrate. Dark to medium glossy green. Camphor odor when crushed. • Fall foliage: Typically quite showy on most individuals. Best trees are orange, red, burgundy, and purplish. Some trees drop leaves yellow and green. • Foliage Porosity Summer: Dense • Foliage Porosity Winter: Porous • Foliage Texture: Medium • Fall Conspicuous: Yes • Leaf Retention: No

Size/Age/Growth

Active Growth Period: Spring and Summer • Growth Rate: Moderate. • Mature Height (feet): 100.0 • Maximum Height at 20 Years (feet): 45 • Size: Typically 60 to 80' tall and 40 to 60' wide; can easily exceed 100' tall. • Vegetative Spread Rate: Moderate • Lifespan: Lifespan

Landscaping

Landscape Uses: Lawn tree or shade tree for larger residences. For fall color. Street tree where ample room is provided. Parks and campuses. • Liabilities: Chlorosis on high pH soils. Lack of cold hardiness , especially young trees . Because of wide geographical range it is important to use northern seed. sources for trees in New England or the Northeast. Has a shallow root system . Spiny fruit balls can be a litter problem. • Care: Follow a regular watering schedule during the first growing season to establish a deep, extensive root system . Watering can be reduced after establishment. Feed with a general purpose fertilizer before new growth begins in spring .

Habitat

Fields , woodlands, flood plains , low hammocks , swamps , riverbanks; 0-800 m [2].

Cold hardy to zone 5.

Typically found at an altitude of 0 to 1,603 meters (0 to 5,259 feet).[3]

Biology

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Reproduction

Duration: PerennialCoppice Potential: Yes • Progagated by Bulbs: No • Propagated by Bare Root: Yes • Propagated by Container: Yes • Propagated by Corms: No • Propagated by Cuttings: No • 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: Prefer deep, moist, bottomland soils. Best in full sun , does okay in partial shade. Transplant B&B due to fleshy , coarse root system . Use larger plants when transplanting in colder areas to avoid cold injury. to twigs .

Soil: Full, moist, slightly acidic soil. Tolerates wet soils. • Adapted to Medium Textured: Adapted to Medium Textured Soils • Adapted to Coarse Textured Soils: Yes • Anaerobic Tolerance: Low • Salinity Tolerance: None • CaCO3 Tolerance: Low • Minimum pH: 4.5 • Maximum pH: 7.0 • Fertility Requirement: Medium

Sunlight: Sun Exposure: Full sunShade Tolerance: Intolerant

Moisture: Drought Tolerance: Low • Minimum Precipitation: 40 • Maximum Precipitation: 60 • Moisture Use: High • Water Requirements: Water regularly, when top 3 in. of soil is dry.

Temperature: Minimum Temperature (F): -21°F. • Minimum Frost Free Days: 180 • Heat Zones: High: 9 (>120 to 150 days) Low:1 (< 1 days) (map) • Cold Hardiness: 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b. (map)

Taxonomy

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Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Name verified on

Place of publication : Sp. pl. 2:999. 1753

Name verified on 20-Nov-2007 by ARS Systematic Botanists. Last updated: 20-Nov-2007

Similar Species

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Members of the genus Liquidambar

ZipcodeZoo has pages for 123 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

L. acalycina (Changs Sweetgum) · L. acalycina 'Burgundy Flush' · L. acerifolia · L. altingia · L. altingiana · L. asplenifolia · L. 'Aurora' · L. barbata · L. californicum · L. callarche · L. cerasifolia · L. chinensis · L. edentata · L. 'Elstead Mill' · L. europaea · L. europaeum · L. excelsa · L. formosana (Formosa Sweetgum) · L. formosana 'Afterglow' (Formosa Sweetgum) · L. formosana Hance var. monticola Rehder & E.H.Wilson · L. formosana Monticola Group · L. gummifera · L. imberbis · L. incerta · L. 'Lane Roberts' · L. macrophylla · L. magniloculata · L. maximowiczii · L. miosinica · L. orientale · L. orientalis (Oriental Sweet-Gum) · L. orientalis var. integriloba · L. orientalis var. orientalis · L. pachyphyllum · L. 'Palo Alto' · L. peregrina · L. rasamala · L. 'Richared' · L. rosthornii · L. stryaciflua · L. styraciflua (American Sweet Gum) · L. styraciflua 'Andrew Hewson' · L. styraciflua 'Anja' · L. styraciflua 'Anneke' · L. styraciflua 'Argentea' · L. styraciflua 'Aurea' · L. styraciflua 'Aurea Marginata' · L. styraciflua 'Aurea Variegata' · L. styraciflua 'Aurora' (Aurora Sweetgum) · L. styraciflua 'Autumn Glow' · L. styraciflua 'Bratzman' · L. styraciflua 'Burgundy' (Burgundy Sweetgum) · L. styraciflua 'Byrne' · L. styraciflua 'Carnival' · L. styraciflua 'Cherokee' (Sweetgum) · L. styraciflua Cherokee = 'Ward' · L. styraciflua 'Clydesform' · L. styraciflua 'Corky' (Corky Sweetgum) · L. styraciflua 'Emerald Sentinel' · L. styraciflua f. pendula · L. styraciflua f. rotundiloba (Round-Lobed Sweetgum) · L. styraciflua 'Fastigiata' · L. styraciflua 'Festeri' · L. styraciflua 'Festival' (Festival Sweetgum) · L. styraciflua 'Fremont' · L. styraciflua 'Frosty' · L. styraciflua 'Globe' · L. styraciflua 'Golden Sun' · L. styraciflua 'Golden Treasure' · L. styraciflua 'Goldstar' · L. styraciflua 'Gold Dust' (Sweetgum) · L. styraciflua 'Grant's Seedless Zn-4' · L. styraciflua 'Grazam' (Grandmaster Sweetgum) · L. styraciflua 'Gumball' (Sweetgum) · L. styraciflua 'Gum Ball' · L. styraciflua 'Hagen' · L. styraciflua 'Hapdell' · L. styraciflua 'Happidaze' · L. styraciflua Happidaze = 'Hapdell' · L. styraciflua 'Jennifer Carol' · L. styraciflua 'Joseph's Coat' · L. styraciflua 'Keith Davey' · L. styraciflua 'Kent' · L. styraciflua 'Kia' · L. styraciflua 'Kirsten' · L. styraciflua L. 'Rotundifolia' · L. styraciflua 'Lane Roberts' · L. styraciflua 'Levis' · L. styraciflua 'Lollipop' · L. styraciflua 'Manon' · L. styraciflua mexicana · L. styraciflua 'Midwest Sunset' · L. styraciflua 'Moonbeam' · L. Styraciflua 'Moraine' · L. styraciflua 'Naree' · L. styraciflua 'Oconee' · L. styraciflua 'Paarl' · L. styraciflua 'Palo Alto' (Palo Alto Sweetgum) · L. styraciflua 'Parasol' · L. styraciflua 'Pendula'

More Info

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Further Reading

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  • Bogle, A. L. 1986. The floral morphology and vascular anatomy of the Hamamelidaceae: Subfamily Liquidambaroideae. Ann. Missouri Bot. Gard. 73: 325-347.
  • Duncan, W. H. 1959. Leaf variation in Liquidambar styraciflua L. Castanea 24: 99-111.
  • Hill, A. F. 1952. Economic Botany. New York.
  • Holm, T. 1930. Leaf-variation in Liquidambar styraciflua L. Rhodora 32: 95-105.
  • Sargent, C. S. 1890-1902. The Silva of North America.... 14 vols. Boston and New York. Vol. 5, pp. 7-12.
  • Schery, R. W. 1952. Plants for Man. New York.
  • Schmitt, D. 1966. Pistillate inflorescence of sweetgum (Liquidambar styraciflua L.). Silvae Genet. 15(2): 33-35.
  • Wilson, P. 1905. Altingiaceae: Liquidambar. In: N. L. Britton et al., eds. 1905+. North American Flora.... 47+ vols. New York. Vol. 22, p. 189.
  • Notes

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    Contributors

    Data Sources

    Accessed through GBIF Data Portal November 20, 2007:

    Identifiers

    Footnotes

    1. "Liquidambar". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
    2. "Liquidambar styraciflua". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
    3. Mean = 229.480 meters (752.887 feet), Standard Deviation = 307.850 based on 1,038 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
    Last Revised: 2009-08-10