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Dioscorea is a genus of over 600 species of flowering plants in the family Dioscoreaceae, native throughout the tropical and warm temperate regions of the world. The vast majority of the species are tropical, with only a few species extending into temperate climates.
The best-known member of the family is the yam (some species of Dioscorea). The APG system (1998) and APG II system (2003) both place it in the order Dioscoreales , in the clade monocots . However, the circumscription changed in the APG II system, with the 2003 system expanded to include the plants that in the 1998 system were treated in the ...
Male Dioscorea batatas (D. polystachya) in Hooker's A General System of Botany 1873 . While Lindley did not use the term "Dioscoreales", he placed the family Dioscoraceae together with four other families in what he referred to as an Alliance (the equivalent of the modern Order) called Dictyogens.
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Dioscorea polystachya or Chinese yam (simplified Chinese: 山药; traditional Chinese: 山藥), also called cinnamon-vine, [2] is a species of flowering plant in the yam family. It is sometimes called Chinese potato or by its Korean name ma .
Dioscorea composita, or barbasco, is a species of yam in the family Dioscoreaceae. [ 1 ] [ 2 ] It is native to Mexico . It is notable for its role in the production of diosgenin , which is a precursor for the synthesis of hormones such as progesterone . [ 3 ]
Dioscorea communis or Tamus communis is a species of flowering plant in the yam family Dioscoreaceae and is commonly known as black bryony, lady's-seal or black ...
Dioscorea villosa is a species of twining tuberous vine which is native to eastern North America. It is commonly known as wild yam, colic root, rheumatism root, devil's bones, and fourleaf yam. [4] It is common and widespread in a range stretching from Texas and Florida north to Minnesota, Ontario and Massachusetts. [3] [5] [6] [7] [8]