Carex nigricans

Carex nigricans is a species of sedge known by the common name black alpine sedge.

Distribution
This sedge is native to western North America from Alaska to the Sierra Nevada in California, to Colorado, where it grows in wet areas in mountain, taiga, and tundra habitat.

Description
Carex nigricans produces thick mats and loose clumps of stems up to 30 centimeters tall from a network of short rhizomes. The pistillate flowers have dark bracts and the fruit is covered in a dark colored, long beaked perigynium.