peas
The rounded seeds are called "green peas" when they are fresh and "dried peas" when they are dried.
split peas 
These pea seeds, dried and split in two, are generally puréed and used in various kinds of soups.
chick peas 
Basic ingredient of hummus and falafel and found in couscous; they are also used to make various southern French dishes such as estouffade.
green peas 
Delicious freshly picked, they are also available frozen or canned; a component of mixed vegetables and of dishes labeled "à la jardinière".
sweet peas 
Eaten freshly picked with the sweet and crunchy pod, hence their name; they are especially popular in Chinese dishes.