The Kumara is the Maori sweet potato.
Maori call the potato, 'Riwai' and the sweet potato, 'Kumara'.
something inside a potato they call badbrah
A sweet potato
We have potatoes here, that we call provisions. So yes.
Maoris
no a sweet potato is a tubers
Sweet potato is a fibrous root because the potato itself is the root.
sweet potato
root
A sweet potato is a vegetable. Sweet potato's are considered to be a root vegetable because it grows underground. The sweet potato is pinkish orange in color.
Sweet potato reproduces by roots that can grow into new sweet potatoes. -Note that the reproduction methods of the sweet potato and potato are different.
yams No, that is not correct. I have been a American all my life :) and speaking for the Seattle area we call a sweet potato a sweet potato. They are two different things and have many completely different nutritional values. Now, if you head to the south I think you will find a variety of different names for yams. Don't ask, they talk weird down there :)