Buttress roots are not edible.
its the roots.
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.
You can eat Indian cucumber roots
The Chinese use the roots in herbal medicine.
Yes, provided you haven't treated it with pesticides or synthetic fertilizers. My family likes to eat it in salads.
yes.
yes they are!
Spider plants are in the lily family, related to day lilies, which have edible tuberous roots. So, technically spider plant roots should be edible by the definition of being non-toxic. However, I would not recommend eating your decorative house plants.
Try looking in the Peterson Fied Guide to Wild Edible Plants.
There are several edible roots of tropical vines, including taro, yam and jicama.