Nil bonolota, Bengal trumpet, thunbergia grandiflora

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 clockvine, 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.


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.