This is sweet potato. Here in the US they plant this together with other plants in a huge pot because it has a nice yellowish color it blends well with other plants. But in the Philippines we don't usually put it in a pot for decoration because the top of this sweet potato plant we use it for salad. I always remember my mother used to bring this from school and she make a good salad from this. She blanch the top leaves with hot water, then she prepare vinegar, salt, tomatoes and onions then mixed it to the sweet potato leaves.
Linking this post to GREEN MONDAY