There are several plants called sweet potato, all are scramblers/vines/climbers - even a climber can't climb if there is nothing to climb up.
Creepers
Some creeper plants are:Coral PeaFraser Island CreeperGolden HopHeart Leaf Flame PeaHybrid Tea RoseIvy Leaf GeraniumChinese Trumpet Creeper
carper grass, mimosa, sweet potato plant
The sweet pea is a popular annual garden plant, a climber with pretty flowers.
a tuber
It is indeed! For more information see 'Related Links' below.
plant it
A sweet potato grows in the ground as a tuber. It is a vine plant.
cassava,sweet potato
i love you Mom
300 inches
Ipomoea is a sweet potato plant that is grown for it colorful vines, it does not produce sweet potatoes.
Are you directing at the plant or the sweet potato which is a root itself? Well, the adaptation for the sweet potato plant's root is that it is a structural adaptation and is modified to store food well. As for the sweet potato plant itself , it's the root and the creeping stem which is extensive as it covers a greater area of land.