Aztecs used to eat the tubers. Now we just enjoy the flowers.
dahlia, asparagus
Jack-in-the-pulpit roots are edible, but only after drying and cooking it.
If you grow dahlias where the temperatures get below freezing, you will need to dig your bulbs up and store them indoors for the winter.https://www.dahliabarn.com/dahlia-care/
The Chinese use the roots in herbal medicine.
A perennial plant with twisting, climbing vines with fleshy edible roots.
Buttress roots are not edible.
You can eat them raw in salad or bake in bread.
They are called tubers.
dahlia
Seems that some species of dahlia tubers are edible and other are toxic if eaten in large quantities.
A Dahlia forms a tuber from which fibrous roots grow.
dahlia, asparagus
Jack-in-the-pulpit roots are edible, but only after drying and cooking it.
The reed is not edible, but some species of reed have edible tuberous roots.
If you grow dahlias where the temperatures get below freezing, you will need to dig your bulbs up and store them indoors for the winter.https://www.dahliabarn.com/dahlia-care/
You can eat Indian cucumber roots
The Chinese use the roots in herbal medicine.