Nil bonolota or Bengal trumpet (Thunbergia grandiflora, family: Acanthaceae) is a vigorous perennial climber. The climber is native to Indian subcontinent as well as Southeast Asia.
Common names: Nil lota, Nil bonolota, Bengal clock vine, Bengal trumpet, Blue thunbergia.
Flowers are big, pale blue, on pendulous racemes. Sepals 5, petals 5.
Flower-buds of thunbergia grandiflora.
Leaves are angularly cordate and lobed, rough on both surfaces, 10-16 cm long.The plant in its original habitat, Khoiachhora, Mirshorai
It continuously produces flowers in summer through rainy season. It is grown on fence, pergola or wall in Bangladesh. Root of the plant counteracts poison of snake. Leaf juice is stomachic.
Propagation of the plant is caused by cuttings.