Dhoincha or Prickly sesban (Sesbania bispinosa, family: Fabaceae) is an erect and fast growing annual shrub with flexible branches. The water friendly plant can get a height of 7 m, but can be seen more than 1 to 2 meters usually.
Leaves are compound; leaflets 11-45 pairs, deep green, small, 3-4 cm long and 1-1.5 cm wide.
Flowers are showy, spectacular, bright yellow, borne on 15 cm long inflorescence. Sepals 5, petals, 5. Petals are dotted with purplish marks. For this reason, they seem like orchids. It blooms in September-October.
Fruit is a pod, very long, 20-25 cm. Each pod contains numerous seeds. These are brown in color. Propagation of the plant is caused by seeds.
The plant is filled with medicinal properties. The plant is used to increase fertility of soil and destroy insects. The nodule in its roots help to keep nitrogen in the soil firmly.
A dry Dhaincha field is standing in water with its ripe fruits.
It is cultivated in the low lands, usually in waterlogged condition in Bangladesh. The plant is found in Asia and North Africa.