Air potato is the common name of dioscorea bulbifera. The tubers sometimes weigh several pounds. They are edible and have a potato like flavor.

Air Potato

Air potato is the common name of dioscorea bulbifera. The tubers sometimes weigh several pounds. They…

"Arrow-root (M. arundinacea). a, tubers; b, leaf and flowers; c, stamen and style." — Chambers' Encyclopedia, 1875

Arrow-root

"Arrow-root (M. arundinacea). a, tubers; b, leaf and flowers; c, stamen and style." — Chambers'…

A species of sunflower cultivated for its tuber, which is used as a root vegetable.

Jerusalem Artichoke

A species of sunflower cultivated for its tuber, which is used as a root vegetable.

The common name of batatas edulis is the sweet potato. The tubers of the plant are edible.

Batatas Edulis

The common name of batatas edulis is the sweet potato. The tubers of the plant are edible.

The rhizome of calathea is tuberous. Pictured is a tuber of calathea.

Tuber of Calathea

The rhizome of calathea is tuberous. Pictured is a tuber of calathea.

A corm , or solid bulb, as of the Crocus is a sort of rounded tuber. It will become a bulb.

Corm

A corm , or solid bulb, as of the Crocus is a sort of rounded tuber. It will become a bulb.

Illustrated is the foliage and a small tuber of dioscorea alata. The leaves are oblong and heart shaped. The tubers are edible and can grow six to eight feet long.

Dioscorea Alata

Illustrated is the foliage and a small tuber of dioscorea alata. The leaves are oblong and heart shaped.…

Roots of the carrot are designed to absorb moisture and matter from soil, and to hold nutrients for use.

Carrot Root

Roots of the carrot are designed to absorb moisture and matter from soil, and to hold nutrients for…

The Dahlia root is a perennial.

Dahlia Root

The Dahlia root is a perennial.

This shows real roots of the potato, as well as several branches of the stem, with potatoes forming in all stages at their tips.

Potato Root

This shows real roots of the potato, as well as several branches of the stem, with potatoes forming…

So the biennial root becomes large and heavy, being a storehouse of nourishing matter, (Gray, 1858).

Radish Root

So the biennial root becomes large and heavy, being a storehouse of nourishing matter, (Gray, 1858).

In some perennial herbs, prostrate stems or branches underground are thickened with this store of nourishment for their whole length.

Solomon's Seal Root

In some perennial herbs, prostrate stems or branches underground are thickened with this store of nourishment…

Roots of the turnip are designed to absorb moisture and matter from soil, and to hold nutrients for use.

Turnip Root

Roots of the turnip are designed to absorb moisture and matter from soil, and to hold nutrients for…

This illustration shows the formation of tubers: A, old potato or tuber with two shoots reaching up into the air and from the base of these shoots, rhizomes have been formed that are developing new tubers. B, mature tuber with spirally arranged buds, the so-called "eyes" of the potato.

Tubers

This illustration shows the formation of tubers: A, old potato or tuber with two shoots reaching up…

The Yam is a starchy root cultivated as a food crop in certain areas in Asia and Africa.

Yam

The Yam is a starchy root cultivated as a food crop in certain areas in Asia and Africa.