Green lentils are a type of legume that are lens-shaped, pale green, and have a firm texture. 

The plant varies from 15 to 45 cm (6 to 18 inches) in height and has many long ascending branches. The compound leaves are alternate, with six pairs of oblong-linear leaflets about 15 mm (0.5 inch) long and ending in a spine. Two to four pale blue flowers are borne in the axils of the leaves in June or early July. The small pods are broadly oblong and slightly inflated and contain two seeds the shape of a doubly convex lens and about 4–6 mm (0.17–0.24 inch) in diameter. There are many cultivated varieties of the plant, differing in size, hairiness, and colour of the leaves, flowers, and seeds. The seeds may be more or less compressed in shape and can be white, yellow, orange, tan, green, gray, or dark brown in colour; they are also sometimes mottled or speckled.