372 PLANT LIFE OF ALABAMA. 
DESCHAMPSIA Beauv. Agrost.91. 1812. 
Perennial. About 20 species, temperate regions of the globe. North America, 8 
species. 
Deschampsia flexuosa (L.) Trin. Bull. Acad. Sci. St. Petersb. 1:66. 1836. 
ComMon Harr Grass, 
dira flexuosa LL. Sp. Pl. 1:65. 1753. 
Ell. 8k. 1:151. Gray, Man. ed. 6,652. Chap. FL 568. 
EUROPE. 
Alleghenian area. New England, New York; south along the higher Alleghenian 
ranges to Georgia, East ‘l'ennessee, and Missouri. 
ALABAMA: Mountain region. Dry rocky dells. Dekalb County, Lookout Moun- 
tain; about 1,800 feet. May to June; rare, 
Type locality: ‘‘ Hab. in Kuropae petris, rupibus.” 
Herb. Geol. Surv. Herb. Mohr. 
TRISETUM Pers. Syn. 1: £7. 1805. 
About 50 species, cooler temperate regions north and south hemispheres, North 
America, 8. 
Trisetum pennsylvanicum (L.) Beauv.; Roem. & Schult. Syst. Veg. 2: 658. 1817. 
Swamp Oat GRAss. 
Avena pennsylvanica L. Sp. Pl. 1:79. 1753. 
clvena palustris Michx. Fl. Bor. Am, 1:72. 1803. 
Trisetum palustre Torr, F1.N. & Mid. U.S. 1:126. 1824. 
Gray, Man. ed. 6, 653. Chap. F1.568. Scribner, Grass. Tenn. 2:82, ¢. 28, f. 109, 
Alleghenian and Carolinian areas. Southern New York, New Jersey, and North 
Carolina to the mountains of Tennessee and Northern Alabama. 
ALABAMA: Mountain region. Madison County, Gurley’s Place, 1,100 feet altitude, 
June; rare. Perennial. 
Type locality: “Hab. in Pensylvania, alm.” 
Herb. Geol. Surv. Herb. Mohr. 
AVENA L.Sp. PI. 1:79. 1753. Oats. 
About 30 species, of cooler regions. United States, 2 species, 
Avena fatua L. Sp. Pl. 1:80. 1753. - WILD Oats. 
Gray, Man. ed. 6, 653. Wats. Bot. Calif, 2:295. 
EUROPE, 
Introduced, sparingly naturalized ina few localities of the Atlantic States. Abund- 
ant on the coast of California. Annual. 
ALABAMA: Adventive on ballast and fairly established. Mobile County, Pinto’s 
Island. May to June. Annual. 
Type locality: ‘‘ Hab. in Europae agris inter segetes.” 
Herb. Geol. Surv. Herb, Mohr. : 
ARRHENATHERUM BPeauvy. Agrost.55. 1812, 
Six species in Europe. North Africa. West Asia. 
Arrhenatherum elatius (L.) Beauv.; Mert. & Koch, Deutsch. Fl. 1:546. 1823. 
TALL OAT Grass. 
Avena elatior L. Sp. Pl. 1:79. 1753. 
Arrhenatherum avenaceum Beauv. Agrost. 152. 1812. Name only. 
Gray, Man. ed. 6,652. Chap. F1.569, Scribner, Grass. Tenn, 2: &3, 1.28, f. 107. 
Introduced from Europe and naturalized in Ontario and the eastern States, and 
south to Alabama and Mississippi. 
ALABAMA: Cultivated in the Prairie region, and a frequent escape. Mobile, a 
fugitive on ballast heaps. Hale County, Gallion. Cullman County. Perennial. 
‘Type locality: “ Hab. in Europae maritimis et apricis.” 
Economic uses: Valuable hay grass. 
Herb, Geol, Surv, Herb, Mohr. 
