GRASSES OF IOWA. 263 



long; leaves 2 to 6 inches (4-12 cm.) lung, 1 to 2 lines with-, smooth or 

 rough; panicle t» to 13 inches (12-26 cm.) in length, open, the branches 

 spreading or ascending, 2 to 5 inches (4-10 cm.) long, divided and 

 spikelet-bearing above the middle; spikelets three to five-flowered, 1 .1 

 to 2 lines (3-4 mm.) long; emptj glumes acute, glabrous, rough above 

 on the keel, the lower usually l-nerved, the upper three-nerved; flower- 

 ing glumes obtuse, somewhat webby at the base, 1 to 1 \ lines (. 2-3 mm.) 

 long, silky-pubescent on the lower half of the marginal nerves and the 

 mid-nerve, the intermediate nerves obscure or wanting. July to August. 

 Poa flare is common along streams in northern, eastern and central 

 Iowa. A good forage grass. See figure 183, on page 261. 



DISTRIBUTION'. 



Iowa. North Ames (Fawcett) ; Ceylon 3306, Elmore. Minn., 

 Iowa-Minnesota line 1044, New Albin SoS, Ledyard 891. New Albin 

 1009, Dakota City, Steamboat Rock 2329, Marshalltown, Humboldt, 

 Council Bluffs 1283 (Pammel) ; Spirit Lake (Shimek) ; Ames (Zmunt, 

 4, Ball and Sample, P. H. Rolfs, Sirrine, Pammel and Hodson, Hitch- 

 cock, Crozier, Stewart, Beardslee, Weaver); Steamboat Rock 3 1 07 

 (Miss King) ; Sioux City (Miss Wakefield) ; Iowa City (Hitchcock) ; 

 Emmet County, Armstrong (Cratty) ; Jewell Junction 912 (Carver) ; 

 Hamilton County (P. H. Rolfs) ; Hull (Newell) ; Le Claire (F. M. 

 Rolfs) ; Clermont 2078 (Walker) ; Rock Rapids (Shimek) ; Marshall- 

 town 285 (Eckles) ; West Union (Whitmore) ; Iowa City (Hitchcock 

 and Macbride) ; Mason City, Hanlontown (Pammel). 



North America. In swampy places, Nova Scotia and New Bruns- 

 wick to Vancouver Island (J. McCoun), south to New York (Parry), 

 New Jersey, Ohio (Painsville, Beardslee), Illinois, Wisconsin (La 

 Crosse, Pammel 3369), Minnesota (Sandberg), South Dakota (Grif- 

 fith 823), Colorado (Hall and Harbour; Ft. Collins, Crandall ; Lead- 

 ville, Trelea.se; Ft. Collins and Greeley, Pammel), New Mexico (Las 

 Vegas, Vascy 144), Washington (Ophir, Elmer), Oregon (Howell), 

 Montana (Craig), Arizona (Palmer). 



General. Middle and southern Europe to northern Africa and 

 Asia, in Siberia and Asia Minor to the Himalayas. 



9. POA PRATENSIS. 



Poa pro ten sis L. Sp. PI. 67. 1753. Watson and Coulter. Grav. Man. 

 Bot. 665. 1890. (6th ed.) Scribner. Grasses of Term Bull. Univ. Term. 

 Agrl. Exp. Sta. 7: '08. /. 144 1894. Bull. U. S. Dept. Agrl. Div. Agros. 

 7: 279. /. 273. 1900. (3d ed.) Beal. Grasses of N. A. 2: 543. 1896. 

 Nash in Britton and Brown. 111. Fl. 1: 204. /. 466. 1896. 



Poa pratensis var. angusti folia Kunth. Enum. 1: 353. .1833. 



