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Knees with very little taper A bald cypress exhibiting tapered knees. A cypress knee is a distinctive structure forming above the roots of a cypress tree of any of various species of the subfamily Taxodioideae, such as the bald cypress. Their function is unknown, but they are generally seen on trees growing in swamps.
Apart from two species in the yew family, all are in either the pine family (including firs, larches, spruces, pines, Douglas firs and hemlocks) or the cypress family (including junipers, redwoods, giant sequoias, bald cypresses and four genera of cedars). [2] [6] [7] [b] Softwood from North American conifers has a variety of commercial uses.
Cranichis muscosa, the cypress-knee helmet orchid, is a species of terrestrial orchid. It is widespread across most of the West Indies , extending into Central America, southern Mexico, Belize, northern South America, and southern Florida.
Cupressaceae or the cypress family is a family of conifers. The family includes 27–30 genera (17 monotypic ), which include the junipers and redwoods , with about 130–140 species in total. They are monoecious , subdioecious or (rarely) dioecious trees and shrubs up to 116 m (381 ft) tall.
They are occasionally flooded, which builds up the alluvial soils required for the gum, oak and bald cypress trees that typically grow in this type of biome. [5] The trees often develop unique characteristics to allow submergence, including cypress knees and fluted trunks, but can not survive continuous flooding.
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Unlike bald cypress and pond cypress, Montezuma cypress rarely produces cypress knees from the roots. [3] Trees from the Mexican highlands achieve a notable stoutness. One specimen, the Árbol del Tule in Santa María del Tule, Oaxaca, Mexico, is the stoutest tree in the world with a diameter of 11.42 m (37.5 ft). Several other specimens from 3 ...
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.