Abstract
This is the account of the species of Polygonaceae registered for the Serra dos Carajás, Pará state. Two genera and five species have been reported from the canga: Coccoloba coronata, C. mollis and C. parimensis, Polygonum acuminatum, and P. hydropiperoides, while, in the forest, Ruprechtia brachysepala Meisn. has been reported. Descriptions, illustrations, keys and comments are provided.
Key words:
Amazonia; Carajás National Forest; floristics; taxonomy
