32 GRA.MINEAE 



41. KOELERIA Pers. 



Spikelets 2-5-flowerecl. Two lower empty j;lame3 narrow, keeled, 

 acute and unequal in length. Flowering glumes obscurely 3-5-uerved. 

 Palet hyaline, 2-nerved. 



1. K. crlstata (L.) Pers. Culms tufted, l°-2° high- panicle spike- 

 like, long-peduncled, 2^-4' long, G'^ wide : branches very short and com- 

 pactly dowered : spikelets 2'^ long. — Rocky prairies near Lee's Summit 

 and rarely found along railroads. ilay-Juue. 



42. MELICA L. 



F'erennial grasses with 2-8 flowered spikelets in open panicles. Glumes 

 with broad, searious margins or the lower scarious throughout, the lower 

 empty glumes 3-5-nerved, the upper flowering ones 7-1 3-nerved. Kachilla 

 extending be3'ond the flowers, and bearing several small scales convolute 

 around eacli other. 



1. M. diffusa Pursh. MelicGrass. 2°-4° high : panicle 4'-8' long, 

 its I)ranches spreading, ascending or erect : spikelets usually 3-flowered, 

 AV^-o" long, with scabrous flowering glumes. — In rocky woods especially 

 in the southern part. Well distributed and very abundant locally. 

 May-June. 



43. KORYCARPUS Zea. 



Perennial with running rootstocks and long flat leaves. Spikelets in a 

 very simple panicle, 3-4-flowered. Two lower glumes empty, acute and 

 coriaceous, much shorter than the flowers. Flowering glumes rounded, 

 shortly niucronate, coriaceous and shining, but with a narrow .scarious 

 margin. Uppermost glumes empty and convolute. 



1. K. dlandrus (Michx.) Kuntze. 2°-4° high.— Rich woods along the 

 blufl's three miles west of Sibley. Not uncommon locally. July. 



44. UNIOLA L. 



Spikelets flat and two-edged in panicles, several-many flowered, 3-6 of 

 the lower glumes empty, the flowering glumes much-keeled and many- 

 nerved. Uppermost glumes often smaller and empty. Palets sliarply 

 2-keeled, half the size of the glume. 



1. U. latifolia Michx. Simkk Gr.ass. 2°-.'j° high : panicle about 6' 

 long, one-sided, its branches spreading or pendulous: spikelets 7"-10''' 

 long, Q''-9," wide, oblong, 5-l()-fl()wered, very flat, on long capillary 

 often drooping pedicels. — In rocky wood.s. Local. Swope's Park to 

 south of Dodson, Little Blue Tank an<l Sibley. .'\ugust-October. 



45. DISTICHLIS Kaf. 

 Dioecious perennials with niany-llowered spikelets inadense spike-like 

 panicles. Leaves flat at base but involute, pointed. Spikelets com- 

 pressed. Glumes coriaceous, the two lower empty, keeled, few-nerved, 

 shorter tlian the broader, acute, many neived flowering ones. I'alit two- 

 keeled. 



