Скачать или смотреть What Is the Difference between a Sweet Potato and a Yam?

Do you know that American yam is actually sweet potato?
Today the U.S.Department of Agriculture requires labels with the term "American yam" to be accompanied by the term "sweet potato" to avoid the confusion.
The differences between sweet potato and yam are as following:

Difference------------------Sweet Potato------------------------- Yam

Family-----------------------Convolvulacea-------------------------- Dioscoreaceae
Scientific Name----------Ipomoea Batatas----------------------- Dioscorea spp.
Tuberous Root-----------Smooth Skin----------------------------- Rough Skin with hairs
*****Skin color------------ White, Red, Orange-------------------Brown
*****Inside----------------- Purple, White, Orange-----------------White