Tuberous
/ˈtuːbərəs/
Definition 1 of 2
Pro Tip 1/3Naturally Shaped
Describe plants with parts resembling tubers, not man-made objects. 
Her garden had many tuberous flowers with swollen root systems.
Pro Tip 2/3Plant Descriptors
Use to detail the characteristics of certain plants or their parts. 
Farmers harvest the tuberous bulbs of dahlia for their starch.
Pro Tip 3/3Edible Variety
Highlight plants with edible underground growths. 
Sweet potatoes are popular tuberous vegetables prized for their taste.