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Dioscorea villosa. Dioscorea villosa flower petal color is commonly known to be green to brown, or white. Lengths of the flower petals range from 0.5 to 2 mm (1 ⁄ 32 to 3 ⁄ 32 in). The flowers tend to grow out of the axil; this is the point at which a branch or leaf attaches to the main stem.
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 .
Some unregulated transdermal progesterone products contain "wild yam extract" derived from Dioscorea villosa, but there is no evidence that the human body can convert its active ingredient (diosgenin, the plant steroid that is chemically converted to produce progesterone industrially) [125] into progesterone. [126] [127]
Diosgenin, a phytosteroid sapogenin, is the product of hydrolysis by acids, strong bases, or enzymes of saponins, extracted from the tubers of Dioscorea wild yam species, such as the Kokoro. It is also present in smaller amounts in a number of other species.
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.
Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers (some other species in the genus being toxic). Yams are perennial herbaceous vines native to Africa, Asia, and the Americas and cultivated for the consumption of their starchy tubers in many temperate and tropical regions.