Common Name: Sticky Indigo. Tamil Name: Naikaduku
Sticky Indigo is sporadically seen in Tamil Nadu, it is a herb that grows to a height of about 20 cm, the entire plant is hairy and sticky. The leaves are pinnate and are arranged in an alternate manner; each containing about 5-7 pairs of leaflets: the axis ends in a leaflet. The leaf measure around 4.9 cm; at the base of the leaf, there is a whisker like stipule each measuring around 3-4 mm. The leaflets are arranged in an opposite manner; margin entire and sessile. The leaflets measure around 6-7 mm in length, the leaflet shape is elliptic, the base is rounded and leaf tip slightly pinched. The inflorescence is in the form of a short raceme. The flowers are pea shaped and are dark pink in color. The flower measurers around 5 mm across. The fruit is in the form of a straight pod, they are arranged in a zigzag manner and have a rusty hairy look. The pod stalk measure around 1 mm and the pod measure around 1.2 cm. This plant is frequently seen in Bharathiar University campus in Coimbatore.