Abstract
Carex impexa is named and described from the Tertiary limestone mountains of the Nelson Region, New Zealand, where it is endemic. This species is most closely related to C. dallii but differs in its broader and more stiffly reflexed leaves, congested spikes, and beakless to scarcely beaked utricles. C. impexa is a calcicole of montane to subalpine shrublands and tussock grasslands.