Cyperus digitatus, also known as finger flatsedge in the United States,[2] and chang xiao sui suo cao in China,[3] is a sedge of the family Cyperaceae that is native to tropical and subtropical areas of Africa, Asia, the Americas and Australia.

The sub-leathery, flat to folded leaf blade has a width of 4 to 15 mm (0.16 to 0.59 in).

[6] The species was first described by the botanist William Roxburgh in 1820 as a part of the work Flora Indica; or descriptions of Indian Plants.

In Australia is found in creek beds and other damp areas in a small area in the Kimberley region of Western Australia[5] as well as other northern tropical parts of the Northern Territory and Queensland.

In Africa it is found as far north as Egypt south through the rest of the continent to Botswana.