Carex petricosa, also known as the rock-dwelling sedge, is a flowering plant native to Alaska, western Canada, Montana, and Quebec.
Description The rock-dwelling sedge grows high in loose clumps with culms that are and have 3-8 spikes that are either female, male (rarely) or both. It has leaves that are wide, brown or black translucent staminate scales.
Variants The varieties can be distinguished by their amount of stigmas and achenes.
Carex petricosa var. petricosa: 3 stigmas and trigonous achenes Carex petricosa var. misandroides: 2 stigmas and biconvex achenes
References