There are many types of baskets that use ribs as part of their structure. Some names are derived from their shape, others from purpose, and construction.
Probably the best known is the Appalacian Egg Basket. It is also known as a gizzard basket because of the shape. The shape distributes the weight of the eggs evenly over each side of the "fanny" and prevents the eggs from rolling. It is formed by using two hoops, squares, or rectangles as a start. The ribs are then built into the structure.
The herb or pie basket was used to gather herbs or carry pies as the name suggests. The ribs in this basket are on a flat plain and produce a sturdy base to support the weight of a delicious pie.
The Potato Basket was used to gather potatoes. Its' construction is similar to the egg basket but utilizes only one hoop. The handles are worked into the sides making this basket easy to carry while resting on your hip.
The Key Basket was used for storing keys. Its' flat back allowed it to hang perfectly against a wall. This was important for the mistress on large plantations. She would keep the keys to the many door locks secure in one location in the main house. The basket was easy to transport all the keys at one time as she managed the duties of the property. Take note of the shape of this basket. It is as if an egg basket had been cut down the center. Its' construction uses the techniques used in the egg basket, while its' flat back draws from those of the herb.
There are many other types I won't cover in this setting, such as the hen or Scottish yarn.
The last type I'll address uses pure whimsy. It could have multiple uses but, its' purpose was to explore a wide realm of natural materials that can be used. The handle is a stick. The ribs are fashioned from Rattan. Items used to complete the weaving include handspun yarn, leather, Daylilly leaves, bailing twine, waxed linen, cotton string, raffia, sea grass, and Philodendron leaves.