616 POACE.E. 



Porennial; 10-00 cm. high. Leaves of tlie culm 3 in number, the 

 shoatli of the middle one usually sliorter than tlio interuodo; ligulo 

 truncate, laciniate, 1 mm. loii;,^ blades ilut, 5-15 cm. long, .'{-4 mm. 

 wide. Panicle erect, thin, 5-15 om. long, rays of the larger panicles 

 mostly in fours, the longest 0-10 cm. long, bearing 1-3 spikelcts. 

 Spikelets 3-5-flowered, 20 mm. long, first glume ovate-lanccoliitc, 

 3-5-nerved, G-7 mm. long, second oval, 7-nerved, 8 nun, long, joiiit 

 of raciiilla 3 mm. long; Horal glume cliartaceous, ovate-lanoeolatc, 

 5-nerved, 13 mm. long, awn 4-0 mm. long; i»al('a 10 mm, long. 



Mexico (Oaxaca), Prinyle 4S07, growing at an altitude of 1)500 

 feet. Professor Serlbncr identifies it as near />'. grandijlorus Hook. 



Vi. B. unioloides (Willd.) II. H. K. ^'ov. Gen. et Sp. 1:151 

 (1815). SciiHADEii's liuGMi's. KKscuK-dUASs. Fentitca uiiidloides 

 AVilld. Ilort. lierol. 1:3, /. 5 (ISOG). lironms cathaHiciis Vald, 

 ,Symb. liot. 2:23 (1790-94). Cemfochloa fcsfitroides Beauv. 

 Agrost. 75 (1812). Ccratochloa unioloides PC. Cat. Ilort. Monsp. 

 f)2 (1813). Bromus Willdenowii Kuntli, Rev. Gram. 1: 134 (1829- 

 35). Ceratochlo(t2)cndiiIaSdn'ai\. Tnd. Sem. Ilort. Gotting. (1830). 

 B. Svhradcri Kxnith, Fauixu. PI. 1:410 (1833). Bromus Ilaen- 

 keamis Kuntli, Enum. PI. 1:410 (1833). Ceratochha aifsfndis 

 Spreug. Steud. Nom. Ed. 2, 1:332 (1841). 



A stout erectannual. 00-90 cm. high. Sheaths shorter than the 

 internodes, often pubescent, throat si)aringly ciliate, ligule 3-5 mm. 

 long; blades flat, 4-5 in numbei', mostly smooth on the lower side, 

 scabrous on the upper, 20-30 cm. long, 5-8 mm. wide. Panicle strict, 

 linear or spreading, 15-20 cm. long, rays rather stout, mostly in 

 twos and threes, rather remote, 10-18 cm. long, bearing each 1 to few 

 spikelets along three-fifths of the upper part. Spikelets much com- 

 pressed, oval to linear-lanceolate, 2.5-3.5 cm. long, joint of rachilla 

 scubrid above, al)Out 3 mm. long; empty glumes firm, lanceolate, 

 first 5-nerved, 9-12 mm. long, second 7-9-nerved, 11-14 mm. long; 

 floral glume firm, scabrid, ovate-lanceolate, 9-nerved, 12-18 mm. 

 long, the awn 2-4 mm. long; palea linear, pectinate-ciliate, in- 

 «ourved, 10 mm. long. Grain conduplicate. 



AVashington (l). C.),Vasei/ 750; Mississippi, Tracy; Colorado, 

 Cassidy; Texas, Jenny. 



