10 J S] Thk Grasses of Illinois 333 



Chicago, BdhcocJc, May, 1S74; Washington Heights, Hill, May, 1882; South park, 

 Chicago, Clarl-, May, 1902. DU page co. Naperville, Vmhach, May, 1895. 

 GRUNDY CO. Without locality, Brendcl. lake CO. Beach, Gates 1651. mchenry 

 CO. Without locality, Vasey; Eingwood, Vasey in 1853. winnebago CO. With- 

 out locality, M. S. Behh. 



17. MILIUM (Tourn.) L. 



These ^-rasscs are distinguished by the narrow, one-llowered spike- 

 lets in which the glumes are equal and exceed the hard, shiny lemma 

 and palea, which I'cscmhle those of species of Pnnieuni. The leaves 

 are thin and flat and the ligule thin and membranous, 3 to 4 mm. long. 

 The panielei is large and open. There is one species in Illinois, which 

 is perennial from creeping rootstocks. 



Milium effusum L. 

 Wild Millet. Tall Millet Grass (Figs. 118 and 119) 



Patterson '76, 52; Flagg '78, 284; Brendel '87, 88. 



Culms erect but weak, smooth, 2 to 6 feet tall ; leaves smooth thru- 

 out, the blades 3 to 9 inches long, 6 to 15 mm. wide; panicles 6 to 20 

 inches long, the drooping branches usually roughened with short, stiff 

 hairs ; spikelets 3 to 3.5 mm. long, the surface of the glumes rough. 



This species is usually found in rich, moist woods. It is native 

 to the northern part of America and is also found in the north of 

 Europe and Asia. 



KANE CO. Elgin, Vasey. tazewell co. Without locality, Brendel. 



18. ORYZOPSIS Michx. 



These perennial grasses are not abundant in Illinois. The spikelets 

 are one-flowered, the glumes long, the lemma rather hard, pubescent, 

 and terminated by a slender, deciduous awn. The leaves are often 

 involute; the ligule is membranous and very short, almost wanting. 

 The inflorescence is of very narrow panicles borne well above the 

 leaves. 



Blades narrow, involute; spikelets, excluding awn, less than 5 mm. long. 



0. pun [I ens 

 Blades broad, flat; spikelets, excluding awn, always more than 5 mm. long. 



Leaves mostly crowded at the base of the plant; blades rough on the upper 



surface but not pubescent. 0. asperifolia 



Leaves distributed along the culm; blades densely pubescent on the upper 



surface. 0. raccmosa 



Oryzopsis asperifolia Michx. 

 White-grained iMoimtain Kicc (Figs. 120 and 121) 



Culms usually erect, tufted, 1 to 2 feet tall, the leaves crowded at 

 the base ; sheaths smooth ; basal blades very long, often longer than the 

 culm, generally covered with whitish bloom, rough on the upper sur- 



