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Taxodium ascendens

Taxodium ascendens, Photo: Michael Lahanas

Superregnum: Eukaryota
Regnum: Plantae
Divisio: Tracheophyta
Divisio: Pinophyta
Classis: Pinopsida
Ordo: Pinales

Familia: Cupressaceae
Subfamilia: Taxodioideae
Genus: Taxodium
Species Taxodium ascendens

Taxodium ascendens Brongn.

Taxodium distichum (L.) Rich. var. imbricarium (Nutt.) H.B.Croom

Note: GRIN treats this as Taxodium distichum var. imbricarium, not as a separate species.

Taxodium ascendens

Taxodium ascendens, Photo: Michael Lahanas


Ann. Sci. Nat. (Paris) 30: 182, 1833.
USDA, ARS, Germplasm Resources Information Network. Taxodium ascendens in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service.

Vernacular names
Deutsch: Aufrechte Sumpfzypresse
English: Pondcypress
中文: 池杉

Taxodium ascendens, also known as pond cypress,[2] is a deciduous conifer of the genus Taxodium, native to North America. Many botanists treat it as a variety of bald cypress, Taxodium distichum (as T. distichum var. imbricatum) rather than as a distinct species, but it differs in habitat, occurring mainly in still blackwater rivers, ponds and swamps without silt-rich flood deposits. It predominates in cypress dome habitats.


Taxodium ascendens reaches on average 15–18 metres (49–59 ft) in height. Compared to T. distichum, the leaves are shorter (3–10 mm long), slenderer and are on shoots that tend to be erect rather than spreading. The trunk is expanded at the base, even on young trees, assisting the tree in anchoring in the soft, muddy soil. The cones also tend to be smaller, not over 2.5 cm diameter. The bark is also a paler gray color. Like bald cypresses, pond cypresses growing in water have a characteristic growth trait called cypress knees; these are woody projections called 'pneumatophores', which are sent above the water from the roots.

This species is native to the southeastern United States, from southeastern Virginia to southeastern Louisiana and south into Florida except for the Florida Keys.

Stunted individuals of pond cypress are notable in the dwarf cypress savanna of the Everglades National Park.
T. ascendens in black water, Okefenokee Swamp, Georgia, USA

Taxodium ascendens occurs naturally in shallow ponds, lake margins, swamps and wetlands. It prefers wet, poorly drained and acidic soils, at an altitude of 0–30 metres (0–98 ft) above sea level.

"NatureServe Explorer 2.0 - Taxodium ascendens, Pond Cypress". Retrieved 6 May 2020.

USDA, NRCS (n.d.). "Taxodium ascendens". The PLANTS Database ( Greensboro, North Carolina: National Plant Data Team. Retrieved 8 December 2015.

Flora of North America (as T. distichum var. imbricarium)

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