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..
Tall grasses with flat leaf-blades and panicled spikelets. Spikelets 1-flowered. Scales 3; the 2 outer empty, keeled, acute; the third scale similar, but usually short-awned on the back, subtending a palet and a stalked perfect flower; palet a little shorter, 1- or 2-nerved. Stamen 1. Styles short, distinct. Stigmas plumose. Grain narrow, free, enclosed in the scale and palet. Seed adherent to the pericarp. [Greek, from Dioscorides.]
Panicle narrow at maturity, its filiform branches erect or drooping; spikelets 2 1/2"-3" long; first
scale much shorter than the second.
Panicle open, its capillary branches flexuous and drooping; spikelets 1 1/2"-2" long; first scale
about equalling the second.
Cinna arundinacea L. Sp. PI. 5. 1753.
Culms 2°-5° tall, erect, simple, smooth and glabrous. Sheaths usually shorter than the in-ternodes, overlapping at the base of the culm, smooth or roughish; ligule 1"-2" long, truncate; blades 6'-1° long, 2"-7" wide, scabrous; panicle 6'-12' in length, usually contracted, sometimes purple, the filiform branches erect or drooping, the lower 1 1/2'-4 1/2' long; spikelets 2 1/2"-3" in length, the scales acute, scabrous, especially on the keel, the first one shorter than the second; third scale slightly exceeded or equalled by the second, usually bearing an awn about \" long from the 2-toothed apex.
Agrostis latifolia Treviran, in Goeppert, Beschr. d. Bot.
Culms 2°-4° tall, erect, usually slender, simple, smooth and glabrous. Sheaths shorter than the in-ternodes, sometimes slightly scabrous; ligule 1"-2" long; blades 4'-10' long, 2"-6" wide, scabrous; panicle 5'-10' in length, open, the capillary branches generally spreading, flexuous and often drooping, the lower 1 1/2'-5' in length; spikelets 1 1/2"-2" long: scales scabrous, the outer acute, strongly hispid on the keel, the first about equalling the second; third scale usually exceeded by the second and bearing a rough awn 1/2"-1" long from the 2-toothed apex.
In damp woods, Newfoundland to British Columbia, New Jersey and Washington and in the Alleghanies to North Carolina, and in the Rocky Mountains to Colorado and Utah. Also in northern Europe. Ascends to 5000 ft. in the Adirondacks. Aug.-Sept.