GRASSES OF IOWA. 267 



son, Buchanan and Lunimis ; Rhodes Canon, alt. 9800 ft., Pammel and 

 Stanton; Mill Creek 150, Wilson's Peak 158, Pammel and Stanton). 



General. Great Britain, Germany to Switzerland and arctii 

 gions of Europe. 



10. POA ARACHNIFERA. 



Poa arachnife > -a Torr. Marcy. Exp. Red River La. 301. 1853. Beal. 

 Grasses of N. A. 2: 535. 1896. Scribner. Bull. U. Dept. Agrl. Div. 

 Agros. 17: 216. /. 542. 1899. 



Poa arachnife ru Buckley. Scribner. Grasses of Tenn. Bull. Univ. 

 Term. Agrl. Exp. Sta. 7: 110. f. 151. 1894. 



DESCRIPTION. 



Texas Blue Grass. A rather strong growing perennial, 1 to 3 

 feet \ 2-'/ dm.) high, with an extensively creeping root-stock, longleaves, 

 and narrow, densely flowered panicle. Sheaths firm, striate, smooth; 

 ligule about 1 line {2 mm.) long; leaf-blade Mat, scabrous on the upper 

 surface, smooth beneath, the lower b inches to 2 feet (1-5 dm.) long, the 

 upper 2 to 4 inches (4-8 cm.) long, 1 to 2 lines (2-4 mm.) wide, blunt- 

 pointed at the apex. Spikelets ovate-lanceolate, 2 to 4 lines (4-8 mm.) 

 long, three to seven-flowered ; empty glumes unequal, acute, the first one- 

 nerved, the second three-nerved, scabrous on the keels; flowering glu 

 five-nerved; in the fertile plant the nerves are hairy and there is a very 

 copious tuft of long, cobwebby hairs at the base; in the sterile or stam- 

 inate plants the flowering glumes are smooth. Palea two-keeled, keels 

 hispid and subaristate-pointed. Staminatc and pistillate plants alike, 

 differing only in the wooliness of, the flowering glumes. April to June. 



Texas blue grass has been cultivated in central Iowa, where it is 

 entirely hardy. The species has persisted for several years. See figure 

 186, on page 265. 



DISTRIBUTION. 



Iowa. Ames (Sirrine). 



North America. A native of Texas (Buckley) ; introduced into 

 cultivation in some of the southern states. 



14. SCOLOCHLOA. 



Scolochloa Link. Hort. Berol. 1: 136. 1827. 



G raphe phorum Desv. Nouv. Bull. Soc. Philom.2: 189. 1810. Journ. 

 Bot. 1: 71. 1813. Bentham and Hooker. Gen. PI. 3: 1197. Hackel in 

 Engler and Prantl. Nat. Pflanz. Fam. II. 2: 74. Scribner. Bull. U. S. 

 Dept. Agrl. Div. Agros. 20: 151. /, 120. (Rev. ed.) 



Arundo Endlicher Gen. PI. 91. 



Fluminia Fries. Summ. Scand. Veg. 247. 1846. 



