Bulbostylis cangae is a species of flowering plant in the sedge family, Cyperaceae, that is endemic to the Serra dos Carajás in Brazil.

It was first identified by Nunes et al. (2016) as part of a joint project with the Museu Paraense Emílio Goeldi and the Instituto Tecnológico Vale which identified 55 species of Cyperaceae in the Carajás National Forest and surrounding areas.

Herbarium records of Bulbostylis cangae were collected from the municipalities of and around Parauapebas, including Serra Norte.

Bulbostylis cangae is a perennial sedge grass that grows from 11 to 48 centimeters tall.

It is found on the mountaintops of the Carajás area inside the clefts of the cangas.