This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Glabrous, culms slender, erect, 2 -3 high, long-stoloniferous. Leaves rather dark green, elongated, 3i"S" wide, the uppermost sometimes surpassing the culm; lower bracts similar to the leaves, much overtopping the culm, strongly sheathing; staminate spikes 1-3, sessile or peduncled; pistillate spikes 2-5, all stalked or the upper sessile, cylindric, 1' -3' long, about 1' thick, sometimes staminate at the summit; perigynia much swollen at the base, and 2"-3" in diameter, 6"-9" long, many-nerved, spreading at right angles at maturity, 3-4 times as long as the scarious lanceolate acuminate or aristate scale, abruptly contracted into a subulate 2-toothed beak 2-3 times as long as body; stigmas 3.