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 tufted grasses with flat leaf-blades and a narrow simple panicle. Spikelets few, 3-5-flowered, the rachilla internodes short. Scales 5-7, the lower 2 empty, equalling or nearly as long as the spikelet, the flowering scales very firm, rounded on the back, obscurely 9-nerved, the nerves more prominent at the shortly 3-toothed apex, pilose near the margins, the callus short and obtuse, pilose; palet 2-keeled, ciliate on the keels. Stamens 3. Styles short, distinct. Stigmas plumose. Grain free, enclosed in the scale. [Named in honor of Prof. Siegling, German botanist.]
Festuca decumbens L. Sp. PI. 75. 1753.
S. decumbens Bernh. Syst. Verg. Erf. 1: 20, 44. 1800.
Culms 6'-18' tall, erect, often decumbent at the base, simple, smooth and glabrous. Sheaths shorter than the internodes, villous at the summit; ligule a ring of very short hairs; blades smooth beneath, usually scabrous above, 1"-1 1/2" wide, the basal 3'-6' long, those of the culm 1-3' long; panicle 1'-2' long, contracted, the branches 1' long or less, erect; spike-lets 3-5-flowered, 3"-5" long, the joints of the rachilla very short; lower scales equalling the spikelet, acute; flowering scales broadly oval, ciliate on the margins below, obtusely 3-toothed, with two tufts of hair on the callus.
Introduced into Newfoundland. Native of Europe and Asia. Moor-grass. Summer.