1918] 



The Grasses of Illinois 



387 



Uniola latifolia Michx. 

 Broad-leaved Spike Grass (Fig. 227) 



Lapham '57, 547, 583 (Plate 3, Fig. 3); Patterson '76, 51; Flagg '78, 282; 

 Brendel '87, 88. 



Culms erect, smooth, 2 to 5 feet tall ; sheaths smooth, shorter than 

 the intemodes ; ligule membranous, the edges erose, about 1 mm. long ; 

 blades 4 to 10 inches long, 5 to 20 mm. wide, sharply pointed at the 

 ai)ex, the edges rough and often ciliate near the base ; panicle branches 

 slender, drooping with the weight of the large spikelets ; spikelets 1 5 

 to 30 mm. long, the lemmas 9 to 12 mm. long, keeled, ciliate on the keel. 



ILLINOIS SPECIMENS: Without locality, southern Illinois, Vasey. chris- 

 tian CO. Taylorvillc, Andrews, jackson (0. Makanda, Seymour, Aug., 1880. 

 KANKAKEE CO. Kankakee, Hill, June, 1870. macon co. Decatur, Cloleij, Aug., 

 1896. MACOUPIN CO. Carlinville, Bobertson, Aug., 1880. mexard co. Athens, 

 Hall in 1868. pope co. Herod, Clinton, July, 1898. pulaski co. Mound (Jity, 

 Brendel ST. clair co. Without locality, Brendel, Aug., 1850; Mascoutah, Welsch. 

 UNION CO. Cobden, Seymour 37. wabash co. Without locality. Shearer; Old 

 Palmyra, SchnecJc, Aug., 1904; Hanging Eock, Schneck, Oct., 1900; Mt. Carmel, 

 Schnecl', July, 1879. 



I 225 



226 



Figs. 225-229.^22.5, D. diandra, inflorescence; 226, D. diandra, spikelet; 

 227, U. latifoUa, inflorescence; 228, B. glomerata, spikelet; 229, B. glomerata, 

 inflorescence 



53. DACTYLIS L. 



This European genus is represented in Illinois by a single species. 

 D. glomerata. It is distinguished by the peculiar form of the panicle 

 which is composed of one-sided clusters of densely crowded spikelets 

 at the ends of the stiff, naked branches. The branches spread at flow- 

 ering, but contract at maturity. The spikelets are 2- to 5-flowered, flat- 

 tened; the lemmas are ciliate and awn-pointed. The leaves are long 

 and narrow, the ligule thin and membranous, 1 to 5 miii. long. 



