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Dioscorea opposita, the Chinese pharmaceutical name is Rhizoma dioscoreae. There are between 600 and 800 different species of Dioscorea.
Cleonymia opposita was created in 1870.
Dioscorea alata was created in 1753.
Dioscorea orangeana was created in 2009.
The Latin name of Mexican yam is Dioscorea mexicana.