Willisia is a genus of flowering plants belonging to the family Podostemaceae.

[1] It is native to Bangladesh and India.

[1] Known species:[1] The genus name of Willisia is in honour of John Christopher Willis (1868–1958), an English botanist known for his 'Age and Area hypothesis' and his criticism of natural selection.

[2] It was first described and published in Kongel.

Danske Vidensk.