Scientific name: Cajanus cajan (L.) Millsp.
English names: Pigeon Pea, Red Gram, Congo Pea, Cajanus Pea
Local names: ‘Arhar’, ‘Arual’
Taxonomic Position According to Cronquist (1988)
Habit: An erect perennial shrub much branched.
Root: Tap root system
Leaf: compound leaf, pinnately compound, trifoliate, leaflet elliptical to lanceolate, acute.
Infloresnce: a terminal panicle
Flower: zygomorphic, complete, hermaphrodite and paplinaceous.
Calyx: tubuler, sepal 5, gamosepalous
Corolla: Bright yellow in color, papilinaceous composed three types of petal viz. standard, wing and keel, aestivation vexillary.
Androecium: Stamen 10, diadelphous (9)+1.
Gynoecium: Carpel one, ovary superior, placentation marginal.
Fruit: a pod, linear oblong
Seed: rounded, compressed, non-endospermic.
Chromosome number: 2n=22, 44, 66 (Bir and Kumari, 1980)
Economic Importance: It is cultivated as a pulse crop, it is also important medicinally. Tender leaves ate reported to be chewed in case of aphthalmia and spongy gurns of the mouth. The poultice made by seeds is used to reduce swelling and treat snakebites.