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   » » Wiki: Cactoideae
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The Cactoideae are the largest subfamily of the cactus family, , and are widely distributed throughout the Americas. Cactaceae is the 5th most endangered plant or animal family evaluated globally by the International Union for Conservation of Nature. Around 80% of cactus species belong to this subfamily.

(1990). 9780674089914, Harvard University Press. .
The genera of the Cactoideae are characterized by microscopic foliage leaves. All photosynthesis occurs in shoot cortex cells covered by a persistent epidermis and stomata. Another important characteristic of this subfamily is ribbed stems, which enable the inner cortex to expand radially without breaking the shoot surface to absorb large quantities of water.Mauseth, J. D. (2006). Structure–function relationships in highly modified shoots of Cactaceae. Annals of Botany, 98(5), 901-926.

, the internal classification of the family Cactaceae remained uncertain and subject to change. A classification incorporating many of the insights from the molecular studies was produced by Nyffeler and Eggli in 2010. Various revisions have been published since, e.g. to the tribes and , and the tribe . Classifications remained uncertain .


Tribes and genera

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