Kanchira or Bengal dayflower (commelina benghalensis, family: commelinaceae) is an annual herb with swollen nodes. It is native to tropical Asia and Africa.
Common names: Kanchira, Bengal dayflower, Tropical spiderwort.
Leaves are green, alternate, simple, 10-15 cm long, with prominent sheath. Inflorescence arises from the axil of a foliage leaf.
Flower is blue, small, sepals 3, petals 3. It blooms in August-September. Propagation of the plant is caused by seeds.
It grows as a weed on fallow land in Bangladesh.