Caesalpinia decapetala seed
Mysore Thorn is a large climber or shrub with sprawling branches, forming large impenetrable thickets, with curved thorns on young branches. The leaf spines also have thorns. Leaves are double-compound, with 3-15 pairs of pinnae, and each pinna having 5-12 pairs of oblong-elliptic, rounded leaflets, 1-2.2 cm long, 0.4-1.1 cm wide. Flowers are perfect, 2.5-3 cm in diameter, in racemes in leaf axils and at the end of branches. Petals are yellow, upper one veined or blotched with red, 1.2-1.5 cm long. Pods are, slightly swollen, 6.5-11 cm long, 2-3 cm wide, and burst open on their own. Seeds are 4-9 black, ellipsoid, laterally flattened, 8-12 mm long, 6-8 mm wide. Flowering: May-April.