well, potatoes, in general, originated from south america.
For potatoes in general, there are over 5000 varieties. Of sweet potatoes about 1000 varieties
They are both varieties of Potatoes.
Honanlulu
Apples
Africa and Asia
Early potatoes are those varieties that produce a crop first. They are set with your main crop potatoes but develop faster.
K. A. Rykbost has written: 'Potato varieties' -- subject(s): Potatoes, Varieties
Potatoes that are contain more starch than the average are used as boiling potatoes. The color of a potato does not dictate its use due to there being hundreds of varieties of potatoes. Potatoes that are ideal for making mashed potatoes are russet varieties (the majority of Idaho grown potatoes are russet, and Caribe. Yukon Gold, Peruvian Blue, Superior, Kennebec, and Katahdin are all purpose potatoes.
What type of potato? If they are not seed potatoes you will get none. Different varieties produce varying amounts but you will get several on each plant.
W. D. Davidson has written: 'History of potato varieties' -- subject(s): Potatoes, Varieties, History 'Potato growing for seed purposes' -- subject(s): Potatoes, Seeds, Varieties, Marketing, Sprouting, Breeding, Diseases and pests 'The history of the potato and its progress in Ireland' -- subject(s): Potatoes, History
I believe you may be looking for scalloped potatoes.
Eggplant has a purple skin. There are also varieties of corn, potatoes, and onions that are purple.