View source for Biology:Taxodium distichum

{{Short description|Species of cypress tree}}
{{Speciesbox
| image = Taxodium distichum NRCSMS01010.jpg
| image_caption = Bald cypress forest in a central Mississippi lake
| status = LC
| status_system = IUCN3.1
| status_ref = <ref name="iucn status 19 November 2021">{{cite iucn |author=Farjon, A. |date=2013 |title=''Taxodium distichum'' |volume=2013 |page=e.T42261A2967873 |doi=10.2305/IUCN.UK.2013-1.RLTS.T42261A2967873.en |access-date=19 November 2021}}</ref>
| status2 = G5
| status2_system = TNC
| status2_ref = <ref>{{Cite web|title=NatureServe Explorer|url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.139459/Taxodium_distichum|access-date=2021-05-17}}</ref>
| genus = Taxodium
| species = distichum
| authority = (L.) [[Biography:Louis Claude Richard|Rich.]]
| range_map = Baldcypress range.jpg
}}

'''''Taxodium distichum''''' ('''bald cypress''', '''swamp cypress'''; {{lang-fr|cyprès chauve}};
''cipre'' in Louisiana) is a [[Biology:Deciduous|deciduous]] [[Biology:Pinophyta|conifer]] in the family [[Biology:Cupressaceae|Cupressaceae]]. It is native to the southeastern United States. Hardy and tough, this tree adapts to a wide range of soil types, whether wet, salty, dry, or swampy. It is noted for the russet-red fall color of its lacy needles.

This plant has some cultivated varieties<ref>{{PLANTS |id=TADI2 |taxon=Taxodium distichum |access-date=8 December 2015}}</ref><ref name="farjon">Farjon, A. (2005). ''Monograph of Cupressaceae and Sciadopitys''. Royal Botanic Gardens, Kew. {{ISBN|1-84246-068-4}}</ref><ref name="fna">{{eFloras|1|200005404|Taxodium distichum |family=Cupressaceae |first=Frank D. |last=Watson}}</ref><ref name="gd">{{Gymnosperm Database |family=Cupressaceae |genus=Taxodium |species=distichum |subspecies=distichum}}</ref><ref name="Silvics">{{Silvics |volume=1 |genus=Taxodium |species=distichum |first1=L. P. |last1=Wilhite |first2=J. R. |last2=Toliver}}</ref> and is often used in groupings in public spaces. Common names include bald cypress, swamp cypress, '''white cypress''', '''tidewater red cypress''', '''gulf cypress''' and '''red cypress'''.<ref name=":2">{{Cite web|url=https://www.mortonarb.org/trees-plants/tree-plant-descriptions/bald-cypress|title=Bald-cypress {{!}} The Morton Arboretum|website=www.mortonarb.org|access-date=2019-01-14}}</ref><ref name="arborday.org">{{Cite web|url=https://www.arborday.org/trees/treeguide/treedetail.cfm?itemID=787|title=Baldcypress Tree on the Tree Guide at arborday.org|website=www.arborday.org|access-date=2019-01-15}}</ref>

The bald cypress was designated the official state tree of Louisiana in 1963.<ref>{{cite book|title=Louisiana Almanac, 2006-2007|page=431|last1=Calhoun|first1=Milburn|last2=Frois|first2=Jeanne|isbn=978-1-58980-307-7|publisher=Pelican Publishing|edition=17th|date=31 May 2006}}</ref> 

==Description==
[[File:Cypress buttresses.jpg|thumb|left|Cypress grove in winter]]

''Taxodium distichum'' is a large, slow-growing, and long-lived [[Earth:Tree|tree]]. It typically grows to heights of {{convert|35|-|120|ft|-1}} and has a [[Diameter at breast height|trunk diameter]] of {{convert|3|-|7|ft|1}}.<ref name=":0">{{Cite book|title=Trees : South Florida and the Keys|others=Koeser, Andrew K.; Friedman, Melissa H.; Hasing, Gitta; Franck, Alan R.; Finley, Holly; Schelb, Julie |year=2017 |isbn=9781683400158 |location=Gainesville, FL|pages=296–7|oclc=962233681|last1 = Koeser|first1 = Andrew K.|last2 = Friedman|first2 = Melissa H. |last3 = Hasing|first3 = Gitta|last4 = Franck|first4 = Alan R.|last5 = Finley|first5 = Holly|last6 = Schelb|first6 = Julie}}</ref><ref>{{Cite web|url=https://www.nwf.org/Home/Educational-Resources/Wildlife-Guide/Plants-and-Fungi/Bald-Cypress|title=Bald Cypress|website=National Wildlife Federation|language=en|access-date=2019-01-21}}</ref>

The main trunk is often surrounded by [[Biology:Cypress knee|cypress knee]]s. The [[Biology:Bark (botany)|bark]] is grayish brown to reddish brown, thin, and fibrous with a stringy texture; it has a vertically, interwoven pattern of shallow ridges and narrow furrows.

The needle-like leaves are {{convert|1/2|to|3/4|in|cm}} long and are simple, alternate, green, and linear, with entire margins. In autumn, the leaves turn yellow or copper red.<ref name=":0" /> The bald cypress drops its needles each winter and then grows a new set in spring.<ref name=":2" />

This species is monoecious, with male and female cones on a single plant forming on slender, tassel-like structures near the edge of branchlets. The tree produces cones in April and the seeds ripen in October.<ref name=":0" /> The male and female strobili are produced from buds formed in late autumn, with pollination in early winter, and mature in about 12 months. Male [[Conifer cone|cones]] emerge on [[Biology:Panicle|panicle]]s that are {{convert|4|–|5|in|cm}} inches long. Female cones are round, resinous and green while young. They then turn hard and then brown as the tree matures. They are globular and {{convert|2.0|-|3.5|cm|in|frac=8|abbr=on}} in diameter. They have from 20 to 30 spirally arranged, four-sided scales, each bearing one, two, or rarely three triangular [[Biology:Seed|seed]]s. Each cone contains 20 to 40 large seeds. The cones disintegrate at maturity to release the seeds. The seeds are {{convert|5|–|10|mm|in|frac=32|abbr=on}} long, the largest of any species of [[Biology:Cupressaceae|Cupressaceae]], and are produced every year, with heavy crops every 3–5 years. The seedlings have three to nine, but usually six, [[Biology:Cotyledon|cotyledon]]s each.<ref name="farjon" /> [[File:The "Senator" bald cypress tree.jpg|thumb|The "Senator" bald cypress tree]]

The bald cypress grows in full sunlight to partial shade. This species grows best in wet or well-drained soil but can tolerate dry soil. It is moderately able to grow in [[Chemistry:Aerosol|aerosol]]s of salt water.  It does well in acid, neutral and alkaline soils across the full range of light (sandy), medium (loamy), and heavy (clay) soils.  It can also grow in saline soils. It can tolerate atmospheric pollution. The cones are often consumed by wildlife.<ref>{{Cite web |url= https://www.arborday.org/trees/treeguide/treedetail.cfm?itemID=787|title=Baldcypress Tree on the Tree Guide at arborday.org |website= www.arborday.org |access-date=2019-01-15}}</ref><ref>{{Cite web |url= https://www.srs.fs.usda.gov/pubs/misc/ag_654/volume_1/taxodium/distichum.htm |title=Taxodium distichum (L|website=www.srs.fs.usda.gov|access-date=2019-01-15}} {{USDA}}</ref>

The tallest known specimen, near Williamsburg, Virginia, is 44.11&nbsp;m (145&nbsp;ft) tall, and the stoutest known, in the Real County near Leakey, Texas, has a circumference of 475&nbsp;in (39&nbsp;ft).<ref name="gd" /> The National Champion Bald Cypress is recognized as the largest member of its species in the country and is listed as such on the [[Biology:National Register of Champion Trees|National Register of Champion Trees]] by American Forest. The National Champion Bald Cypress is in the Cat Island Nation Wildlife Refuge, near St. Francisville, Louisiana, and it is {{convert|96|feet}} tall, {{convert|56|feet}} in circumference, and is estimated to be approximately 1,500 years old. The oldest known living specimen, found along the Black River in North Carolina, is at least 2,624 years old, rendering it the oldest living tree in eastern [[Earth:North America|North America]].<ref>{{cite journal |title=Longevity, climate sensitivity, and conservation status of wetland trees at Black River, North Carolina |journal=Environmental Research Communications |volume=1 |issue=4 |pages=041002 |doi=10.1088/2515-7620/ab0c4a|year=2019|last1=Stahle|first1=D. W.|last2=Edmondson|first2=J. R. |last3=Howard |first3=I. M. |last4=Robbins |first4=C. R.|last5=Griffin|first5=R. D.|last6=Carl|first6=A.|last7=Hall|first7=C. B. |last8=Stahle |first8=D. K. |last9=Torbenson |first9=M. C. A.|bibcode=2019ERCom...1d1002S |doi-access=free }}</ref> 

[[Biology:The Senator (tree)|The Senator]], a bald cypress in Longwood, Florida, was {{convert|165|feet}} tall before the hurricane of 1925, when it lost about {{convert|40|feet}} in height. It had a circumference of {{convert|47|feet}} and a diameter of {{convert|17.5|feet}} and was estimated to be 3,500 years old. It was burned down accidentally in 2012 by a woman smoking methamphetamines.<ref>{{Cite web |date=2012-02-29 |title="Burn In Hell": Facebook Users Attack Woman Arrested For Fire That Killed 3,500-Year-Old Cypress Tree |url=https://www.huffpost.com/entry/the-senator-burns-fire-sara-barnes-arrested_n_1308513 |access-date=2023-02-14 |website=HuffPost |language=en}}</ref>

"Big Dan" is one of the oldest living specimens and is found near High Springs, Florida at Camp Kulaqua.  It is estimated to be 2,704 years old as of 2020.  It is growing in the Hornsby Spring swamp run and is more than 35 feet in circumference.{{cn|date=March 2023}}

==Gallery==
<gallery>
File:Bald Cypress Leaves 2264px.jpg|Foliage
File:Baldcypress cone.jpg|Cones
File:Bald Cypress Taxodium distichum Fingers.JPG|Knees
File:Bald Cypress Taxodium distichum Bark Vertical.JPG|Bark
File:Butressed root system bald cypress.jpg|Detail of lower trunk and buttresses
File:Taxodium distichum seeds, by Omar Hoftun.jpg|Seeds
File:Ademwortels (pneumatoforen) van een moerascipres (Taxodium distichum) 09-02-2023 (d.j.b.).jpg|Cluster of Breath roots (pneumatophores)
</gallery>

==Taxonomy==
The closely related ''[[Biology:Taxodium ascendens|Taxodium ascendens]]'' (pond cypress) is treated by some botanists as a distinct species,<ref name=usda>{{PLANTS |symbol=TADI2 |taxon=Taxodium distichum}}</ref><ref>{{PLANTS |symbol=TAAS |taxon=Taxodium ascendens}}</ref> while others classify it as merely a [[Biology:Variety (botany)|variety]] of bald cypress,<ref name=farjon/><ref name=gd/> as ''Taxodium distichum'' var. ''imbricatum'' (Nutt.) Croom. It differs in shorter leaves borne on erect shoots, and in ecology, being largely confined to low-nutrient [[Earth:Blackwater river|blackwater]] habitats. A few authors also treat ''[[Biology:Taxodium mucronatum|Taxodium mucronatum]]'' as a variety of bald cypress, as ''T. distichum'' var. ''mexicanum'' Gordon, thereby considering the genus as comprising only one species.<ref name=fna1>{{eFloras|1|132353|Taxodium |family=Cupressaceae |first=Frank D. |last=Watson}}</ref>

==Habitat and distribution==
[[Image:Bald Cypress.JPG|thumb|Bald cypress in Trap Pond State Park, Delaware]]
[[File:Caddo Lake- Cypress.jpg|thumb|right|Bald cypress on the {{wipe|Texas}} side of Caddo Lake]]

The native range extends from southeastern New Jersey south to Florida and west to Central {{wipe|Texas}} and southeastern Oklahoma, and also inland up the Mississippi River. Ancient bald cypress [[Earth:Forest|forest]]s, with some trees more than 1,700 years old, once dominated [[Earth:Swamp|swamp]]s in the Southeast. The original range had been thought to only reach as far north as Delaware, but researchers have now found a natural forest on the Cape May Peninsula in southern New Jersey. The species can also be found growing outside its natural native range, in New York and Pennsylvania.<ref name=":0" /> 

The largest remaining old-growth stands are at Corkscrew Swamp Sanctuary, near Naples, Florida, and in the Three Sisters tract along eastern North Carolina's Black River. The Corkscrew trees are around 500 years of age, and some exceed 40 m in height. In 1985, the Black River trees were cored by dendrochronologist David Stahle from the [[Organization:University of Arkansas|University of Arkansas]]. He found that some began growing as early as 364 AD.  Returning to the area in 2019, Stahle discovered a tree dated by its tree-ring count to 605 B. C., ranking as the ninth-oldest tree in the world.<ref>{{cite web
   |url=http://www.pocosinpress.com/Methuselah.pdf
   |title=Searching for Methuselah
   |pages= 1–3
   |author=Paul Ferguson
   |year=2008
   |publisher=Pocosin Press
   |access-date=21 April 2011
}}</ref> 
[[File:Bald Cypress (Taxodium distichum) growing on the Guadalupe River, Kerr County, Texas, USA (14 April 2012).jpg|thumb|Bald cypress (''Taxodium distichum'') growing near the western extreme of its range on the Guadalupe River in the semi-arid Edwards Plateau, Kerr County, Texas (14 April 2012)]]
This species is native to humid climates where annual precipitation ranges from about {{convert|760|mm|in|abbr=in|disp=or}} in Central Texas to {{convert|1630|mm|in|abbr=in|disp=or}} along the Gulf Coast. Although it grows best in warm climates, the natural northern limit of the species is not due to a lack of cold tolerance, but to specific reproductive requirements: further north, regeneration is prevented by ice damage to seedlings. Larger trees are able to tolerate much lower temperatures and lower humidity.{{Citation needed|date=February 2021}}

In 2012 scuba divers discovered an [[Biology:Submerged forest|underwater cypress forest]] several miles off the coast of Mobile, Alabama, in 60 feet of water. The forest contains trees that could not be dated with radiocarbon methods, indicating that they are more than 50,000 years old and thus most likely lived in the early glacial interval of the last ice age. The cypress forest is well preserved, and when samples are cut they still smell like fresh cypress. A team, which has not yet published its results in a peer-reviewed journal, is studying the site. One possibility is that hurricane Katrina exposed the grove of bald cypress, which had been protected under ocean floor sediments.<ref name=":1">{{Cite web|url=http://www.livescience.com/37977-underwater-cypress-forest-discovered.html|title=Primeval Underwater Forest Discovered in Gulf of Mexico|date=8 July 2013|publisher=Live Science|access-date=15 January 2019}}</ref>

==Reproduction and early growth==
[[File:2014-11-02 14 12 30 Bald Cypress foliage during autumn along Hunters Ridge Drive in Hopewell Township, New Jersey.jpg|thumb|right|Foliage in autumn just before shedding]]
The bald cypress is monoecious. Male and female strobili mature in one growing season from buds formed the previous year. The male catkins are about {{convert|2|mm|in|abbr=on}} in diameter and are borne in slender, purplish, drooping clusters {{convert|7|to|13|cm|in|frac=4|abbr=on}} long that are conspicuous during the winter on this deciduous conifer. Pollen is shed in March and April. Female conelets are found singly or in clusters of two or three. The globose cones turn from green to brownish-purple as they mature from October to December. The cones are {{convert|13|to|36|mm|in|abbr=on}} in diameter and consist of 9 to 15 four-sided scales that break away irregularly after maturity. Each scale can bear two (rarely three) irregular, triangular seeds with thick, horny, warty coats and projecting flanges.<ref>Faulkner, Stephen P. 1982. Genetic variation of cones, seed and nursery-grown seedlings of baldcypress [Taxodium distichum (L.) Rich.] provenances. M.S. Thesis, Louisiana State University, Baton Rouge. 71 p.</ref><ref name="Radford, Albert E. 1968">Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. 1968. Manual of the vascular flora of the Carolinas. University of North Carolina Press, Chapel Hill. 1183 p.</ref><ref name="Agriculture, Forest Service 1965">U.S. Department of Agriculture, Forest Service. 1965. Silvics of forest trees of the United States. H. A. Fowells, comp. U.S. Department of Agriculture, Agriculture Handbook 271. Washington, DC. 762 p.</ref><ref name="Silvics"/><ref name="Agriculture, Forest Service 1974">U.S. Department of Agriculture, Forest Service. 1974. Seeds of woody plants in the United States. C. S. Schopmeyer, tech. coord. U.S. Department of Agriculture, Agriculture Handbook 450. Washington, DC. 883 p.</ref> The number of seeds per cone averages 16 and ranges from 2 to 34. Cleaned seeds number from about 5,600 to 18,430 per kg (2,540 to 8,360 per lb).<ref name="Silvics"/><ref name="Radford, Albert E. 1968"/><ref name="Agriculture, Forest Service 1965"/><ref name="Agriculture, Forest Service 1974"/>

===Seed production and dissemination===
Some seeds are produced every year, and good seed crops occur at three- to five-year intervals.<ref name="Agriculture, Forest Service 1974"/> At maturity, the cone scales with their resin-coated seeds adhering to them, or sometimes entire cones, drop to the water or ground.<ref>Stubbs, Jack. 1983. Personal communication. USDA Forest Service, Southeastern Forest Experiment Station, Clemson, SC.</ref> This drop of mature seeds is often hastened by squirrels, which eat bald cypress seeds, but usually drop several scales with undamaged seeds still attached to each cone they pick.<ref>Brunswig, Norman L. 1983. Personal communication. National Audubon Society, Francis Beidler Forest, Harleyville, SC.</ref> Floodwaters spread the scales or cones along streams and are the most important means of seed dissemination.<ref name="Agriculture, Forest Service 1965"/>

===Seedling development===
[[File:Bald Cypress swamp and Spanish Moss.jpg|thumb|Bald cypress swamp and Spanish moss at First Landing State Park in Virginia Beach, VA]]
[[Biology:Germination|Germination]] is [[Biology:Epigeal germination|epigeal]].<ref name="Agriculture, Forest Service 1974"/> Under swamp conditions, germination generally takes place on a sphagnum moss or a wet-muck seedbed. Seeds will not germinate under water, but some will remain viable for 30 months under water. By contrast, seeds usually fail to germinate on better drained soils because of the lack of surface water. Thus, a soil saturated but not flooded for a period of one to three months after seedfall is required for germination.<ref name="Agriculture, Forest Service 1965"/>

After germination, seedlings must grow fast enough to keep at least part of their crowns above floodwaters for most of the growing season.<ref>Conner, William H, 1988, Natural and artificial regeneration of baldcypress [Taxodium distichum (L.) Rich.] in the Barataria and Lake Verret basins of Louisiana. PhD Dissertation, Louisiana State University, Baton Rouge. 148 p.</ref><ref>Conner, William H., and John R. Toliver. 1987. Vexar seedling protectors did not reduce nutria damage to planted baldcypress seedlings. USDA Forest Service, Tree Planter's Notes 38(3):26-29.</ref><ref>Conner, William H., John R. Toliver, and Fred H. Sklar. 1986. Natural regeneration of baldcypress [Taxodium distichum (L.) Rich.] in a Louisiana swamp. Forest Ecology and Management 14:305-317.</ref> Bald cypress seedlings can endure partial shading, but require overhead light for good growth.<ref>Williston, H. L., F. W. Shropshire, and W. E. Balmer. 1980. Cypress management: a forgotten opportunity. USDA Forest Service, Southeastern Area State and Private Forestry, Forestry Report SA-FR-8. Atlanta, GA. 8 p.</ref> Seedlings in swamps often reach heights of {{convert|20|to|75|cm|in|round=0.5|abbr=on}} their first year.<ref>Bull, H. 1949. Cypress planting in southern Louisiana. Southern Lumberman 179(2249):227-230.</ref> Growth is checked when a seedling is completely submerged by flooding, and prolonged submergence kills the seedling.<ref name="Agriculture, Forest Service 1965"/>

In nurseries, ''Taxodium'' seeds show an apparent internal dormancy that can be overcome by various treatments, usually including cold stratification or submerging in water for 60 days. Nursery beds are sown in spring with pretreated seeds or in fall with untreated seeds. Seedlings usually reach {{convert|75|to|100|cm|in|round=0.5|abbr=on}} in height during their first (and usually only) year in the nursery. Average size of 1-0 nursery-grown seedlings in a seed source test including 72 families was {{convert|81.4|cm|in|abbr=on}} tall and {{convert|1.1|cm|in|abbr=on}} in diameter.{{Citation needed|date=January 2019}}

Control of competing vegetation may be necessary for a year or more for bald cypress planted outside of swamps. Five years after planting on a harrowed and bedded, poorly drained site in Florida, survival was high, but heights had increased only {{convert|30|cm|in|round=0.5|abbr=on}}, probably because of heavy herbaceous competition. Seedlings grown in a crawfish pond in Louisiana, where weed control and soil moisture were excellent through June, averaged {{convert|2.9|m|ft|abbr=on}} and {{convert|3.5|cm|in|abbr=on}} diameter at breast height after five years. However, a replicate of the same sources planted in an old soybean field, where weed control and soil moisture were poor, resulted in the same diameter, but a smaller average seedling height of {{convert|2.1|m|ft|abbr=on}}<!-- (John R. Toliver, unpublished data)-->. When planted in a residential yard and weeded and watered, they averaged {{convert|3.7|m|ft|abbr=on}} tall three years later.{{Citation needed|date=February 2021}}

===Vegetative reproduction===

Bald cypress is one of the few conifer species that sprouts. Thrifty sprouts are generally produced from stumps of young trees, but trees up to 60 years old also send up healthy sprouts if the trees are cut during the fall or winter. However, survival of these sprouts is often poor, and those that live are usually poorly shaped and do not make quality saw timber trees. Stumps of trees up to 200 years old may also sprout, but the sprouts are not as vigorous and are more subject to wind damage as the stump decays. In the only report on the rooting of bald cypress cuttings found in the literature, cuttings from trees five years old rooted better than those from older trees.{{Citation needed|date=January 2019}}

==Ecology==
[[File:Bald cypress Atchafalaya Basin.jpg|left|thumb|125px|A bald cypress in the Atchafalaya Basin of Louisiana]]
[[File:Bald cypress knees in duckweed.JPG|thumb|left|125px|Bald cypress knees in duckweed]]
The seeds remain viable for less than one year, and are dispersed in two ways. One is by water: the seeds float and move on water until flooding recedes or the cone is deposited on shore. The second is by wildlife: squirrels eat seeds, but often drop some scales from the cones they harvest. Seeds do not germinate under water and rarely germinate on well-drained soils; seedlings normally become established on continuously saturated, but not flooded, soils for one to three months. After germination, seedlings must grow quickly to escape floodwaters; they often reach a height of 20–75&nbsp;cm (up to 100&nbsp;cm in fertilized nursery conditions) in their first year. Seedlings die if inundated for more than about two to four weeks. Natural regeneration is therefore prevented on sites that are always flooded during the growing season. Although vigorous saplings and stump sprouts can produce viable seed, most specimens do not produce seed until they are about 30 years old. In good conditions, bald cypress grows fairly fast when young, then more slowly with age. Trees have been measured to reach 3 m in five years, 21 m in 41 years, and 36 m in height in 96 years; height growth has largely ceased by the time the trees are 200 years old. Some individuals can live over 1,000 years. Determination of the age of an old tree may be difficult because of frequent missing or false rings of stemwood caused by variable and stressful growing environments.{{Citation needed|date=February 2021}}

[[File:Cypress 8001.JPG|thumb|Bald cypress forest in winter, showing "knees" and (brown) high flood level, Lynches River, Johnsonville, South Carolina]]
Bald cypress trees growing in swamps have a peculiarity of growth called [[Biology:Cypress knee|cypress knee]]s. These are woody projections from the root system project above the ground or water. Their function was once thought to be to provide [[Chemistry:Oxygen|oxygen]] to the roots, which grow in the low dissolved oxygen waters typical of a swamp (as in [[Earth:Mangrove|mangrove]]s). However, evidence for this is scant; in fact, roots of swamp-dwelling specimens whose knees are removed do not decrease in oxygen content and the trees continue to thrive. Another more likely function is structural support and stabilization. Bald cypress trees growing on flood-prone sites tend to form buttressed bases, but trees grown on drier sites may lack this feature. The buttressed base usually begins at the soil surface and usually extends up to the maximum annual flooding elevation. <ref>Pietrzykowski, M., Daniels, W. L., & Koropchak, S. C. (2015). Microtopographic effects on growth of young bald cypress (taxodium distichum L.) in a created freshwater forested wetland in southeastern Virginia. Ecological Engineering, 83, 135–143. https://doi.org/10.1016/j.ecoleng.2015.06.024 </ref> Buttressed bases and a strong, intertwined root system allow them to resist very strong winds; even hurricanes rarely overturn them.<ref name="Silvics" />

Many agents damage ''T. distichum'' trees. The main damaging (in some cases lethal) agent is the [[Biology:Fungus|fungus]] ''Lauriliella taxodii<ref name=":3">{{Cite web|url=http://www.speciesfungorum.org/Names/SynSpecies.asp?RecordID=819213|title=Species Fungorum - Species synonymy|website=www.speciesfungorum.org|access-date=2019-01-21}}</ref>'', which causes a brown pocket rot known as "pecky cypress." It attacks the heartwood of living trees, usually from the crown down to the roots. A few other fungi attack the sapwood and the heartwood of the tree, but they do not usually cause serious damage. [[Biology:Insect|Insect]]s such as the cypress flea beetle (''[[Biology:Systena marginalis|Systena marginalis]]'') and the bald cypress leafroller (''[[Biology:Archips goyerana|Archips goyerana]]'') can seriously damage trees by destroying leaves, cones or bark. [[Biology:Coypu|Nutrias]] also clip and unroot young bald cypress seedlings, sometimes killing a whole plantation in a short amount of time.<ref name="Silvics" />

In 2002, the Indiana Department of Natural Resources identified ''T. distichum'' as a state protected plant with the status of Threatened. Globally, the species is listed as of [[Biology:Least-concern species|Least Concern]] by the IUCN.{{Citation needed|date=February 2021}}

==Cultivation and uses==

[[File:Taxodium distichum02.jpg|thumb|right|{{center|Timber}}]]
The bald cypress is hardy and can be planted in hardiness zones 4 through 10 in the US.<ref name="arborday.org"/> The species is a popular ornamental tree that is cultivated for its light, feathery foliage and orangey brown to dull red autumnal color. In cultivation it thrives on a wide range of soils, including well-drained sites where it would not grow naturally because juvenile seedlings cannot compete with other vegetation. Cultivation is successful far north of its native range, even to southern {{wipe|Canada}}. It is also commonly planted in [[Earth:Europe|Europe]], [[Earth:Asia|Asia]], and other temperate and subtropical locales. It does, however, require hot summers for good growth. 

When planted in locales with the cool summers of [[Earth:Oceanic climate|oceanic climate]]s, growth is healthy but very slow; some specimens in northeastern {{wipe|England}} have only grown to 4–5 m tall in 50 years<ref>Tree Register of the British Isles</ref> and do not produce cones. One of the oldest specimens in [[Earth:Europe|Europe]] was planted in the 1900s in the Arboretum de Pézanin in Burgundy, {{wipe|France}}.  An alley of Louisiana cypress trees was planted in the 18th century in the park of the Château de Rambouillet, southwest of Paris.

Bald cypress has great merchantable yields. In virgin stands, yields from 112 to 196 m³/ha were common, and some stands may have exceeded 1,000 m³/ha.

==Building material==
Still usable prehistoric wood is often found in swamps as far north as New Jersey, and occasionally as far north as Connecticut, although it is more common in the southeastern states. This partially mineralized wood is harvested from swamps in the southeastern states, and is greatly prized for special uses such as for carvings. The fungus ''Lauriliella taxodii''<ref name=":3" /> causes a specific form of the wood called "pecky cypress", which is used for decorative wall paneling.

The bald cypress was used by Native Americans to create coffins, homes, drums and canoes. Joshua D. Brown, the first settler of Kerrville, {{wipe|Texas}}, made his living producing shingles from bald cypress trees that grew along the Guadalupe River of the [[Earth:Texas Hill Country|Texas Hill Country]].<ref>Texas Historical Commission, historical marker in Kerrville, {{wipe|Texas}}, 1971.</ref> 

In the southern United States, the odorless wood, which closely resembles that of other ''[[Biology:Cupressus|Cupressus]]'' species, has been valued since colonial times for its resistance to water, making it ideal for use wherever the wood is exposed to the elements.  In the first half of the 20th century, it was marketed as "The Wood Eternal."<ref>{{cite book |title=Tidewater Red Cypress: U. S. Government Report |date=1926 |publisher=Southern Cypress Manufacturers Association |location=New Orleans |url=https://archive.org/details/TidewaterRedCypressU.s.GovernmentReportdepartmentOfAgriculture/mode/2up}}</ref><ref>{{cite book |title=Tidewater Red Cypress |date=1920 |publisher=Florida Louisiana Red Cypress Company |location=Jacksonville, Florida |url=https://archive.org/details/buildwitharrowbr00flor/mode/2up}}</ref><ref>{{cite book |title=An Inside Story of Tidewater Red Cypress |date=1936 |publisher=Southern Cypress Manufacturers Association |location=Jacksonville, Florida |url=https://archive.org/details/AnInsideStoryOfTidewaterRedCypressForInteriorsOfBeautyAndStability/mode/2up |access-date=12 June 2021}}</ref><ref>{{cite book |title=As Old as the Ark . . . As Modern as Tomorrow |date=1955 |publisher=Southern Cypress Manufacturers Association |location=Jacksonville, Florida |url=https://archive.org/details/TidewaterRedCypressAsOldAsTheArk..AsModernAsTomorrow/mode/2up |access-date=12 June 2021}}</ref>

The lumber is valuable for timber framing, building materials, fence posts, planking in boats, river pilings, doors, blinds, flooring, shingles, garden boxes, caskets, interior trim and cabinetry.<ref>{{Cite web|url=https://plants.usda.gov/factsheet/pdf/fs_tadi2.pdf|website=plants.usda.gov|title=BALD CYPRESS Taxodium distichum (L.) L.C. Rich. |access-date=2019-01-14}}{{USDA}}</ref> 

Bald cypress timbers are commonly available in lengths up to 24 feet. This species enjoys predictable lead times for projects. The wood is a very light tan in color and weathers to a uniform silvery gray. Paint and stains adhere well to Bald cypress. Bald cypress most often sees use in outdoor structures such as timber frame pavilions, mid-size farmers markets, porches, exterior awnings and decorative trusses where the species’ weather resistance helps ensure long life.<ref name=":0" />

==See also==
* Saltwater swamp

== References ==
{{Reflist}}

==External links==
* [https://cypress.uark.edu/ The Ancient Bald Cypress Consortium]
* [http://www.monumentaltrees.com/en/trees/baldcypress/deep_south/ Images of bald cypress trees and swamps]
* [http://www.plantmaps.com/nrm/taxodium-distichum-baldcypress-native-range-map.php Interactive Distribution Map for Taxodium distichum]
* [http://www.monumentaltrees.com/en/photos-baldcypress/ Photos of remarkable bald cypress trees worldwide]
* [http://www.euforgen.org/species/taxodium-distichum/ ''Taxodium distichum''] - information, genetic conservation units and related resources. [[Organization:European Forest Genetic Resources Programme|European Forest Genetic Resources Programme]] (EUFORGEN) 
{{Taxonbar|from=Q148950}}

[[Category:Taxodium|distichum]]

{{Sourceattribution|Taxodium distichum}}