Carex Aperta Boot, p. 46

98 Carex aperta, Boot.

Sterile spikes one, or two, rarely three, oblong-cylindrical, acute; fertile 2 to 4 - oblong, erect, the uppermost
approximate and sessile, the lower distant and
short stalked; lowest bract about the length of the
culm, with oblong brown oricles, the upper bristle-
form shorter than the spikes; perigynia roundish-
ovate, stalked, nerveless, broader and much shorter
than the lanceolate, pointed, brown scale; culm
nearly smooth, one to three feet high. Flowers
in May. Borders of marshes in
prairies or