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..
Perennial grasses, with usually flat leaf-blades, and a narrow contracted spike-like panicle. Spikelets numerous. Scales several, the outer 2 empty ones 1-nerved, the flowering scales broad, rounded at the apex, 3-nerved, the nerves glabrous, the lateral ones vanishing below the margin, the midnerve at the margin or sometimes excurrent as a short tip, the callus pilose; palet 2-keeled. Stamens 3. Styles short, distinct. Stigmas plumose. Grain free, enclosed in the scale. [Greek, in reference to the round flowering scales.]
Bot. 12: Part 2, 33. 1891. Sieglingia albescens Kuntze; L. H. Dewey, Contr. U. S.
Culms tufted, erect, smooth and glabrous, 12'-20' tall, the sterile shoots one-half as long as the culm or more. Sheaths shorter than the internodes, smooth; ligule a ring of short hairs; blades smooth beneath, roughish above, acuminate, 2 1/2'-11' long, 1"-2" wide; panicle dense and contracted, white, 2 1/2'-5' long, 1/4'-3/4' broad, its branches erect or ascending, 1' or less long; spikelets about 7-11-flowered, 2"-2 1/2" long, the empty scales white, 1-nerved, about equal; flowering scales about 1 1/2" long, 3-nerved, the lateral nerves vanishing below the apex, all the nerves glabrous, the midnerve excurrent in a short scabrous point, denticulate and irregularly and obscurely lobed at the truncate apex.