Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge48. Carex sterilis Willd.
Very similar to C. interior, differing mainly as follows: Leaves 1-4 mm wide. Spikes 3-7; pistillate scales acute to cuspidate, about equaling the perigynium body. Perigynium beak prominent, rough, ca. 1/3 the length of the entire perigynium, the teeth sharp, 0.3-0.5 mm long. Late May--Jul. Fens and permanently wet meadows; rare, with records from McHenry Co., ND; (Newf. to ND, s to NJ and IL). C. muricata L. var. sterilis (Carey) Gl.
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