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. 
Aira flexuosa L. Sp. Pl. 1:65. 17538. ; 
Ell. Sk. 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 ‘Tennessee, 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 Europae petris, rupibus.” 
Herb. Geol. Surv. Herb. Mohr. 
TRISETUM Pers. Syn. 1: £7. 1805. 
About 50 species, cooler temperate regions north and south hemisphere3. North 
America, 8. 
Trisetum pennsylvanicum (L.) Beauy.; Roem. & Schult. Syst. Veg. 2: 658. 1817. 
Swamp OaT Grass. 
Avena pennsylvanica L. Sp. Pl. 1:79. 1753. 
Avena 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, t. 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. Kalm.” 
Herb. Geol. Surv. Herb. Mohr. 
AVENA L. Sp. Pl 1:79. 1753. Oats. 
About 30 species, of cooler regions. United States, 2 species. 
Avena fatua L. Sp. Pl. 1:80. 1753. WILp 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 Beauv. Agrost.55. 1812. 
Six species in Europe. North Africa. West Asia. 
Arrhenatherum elatius (L.) Beauv.; Mert. & Koch, Deutsch. Fl. 1:546. 1823. 
TaLL Oar 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: 83, 1. 28, f. 111. 
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. 
