616 POACE^. 



Perennial; 10-90 cm. high. Leaves of the culm 3 in number, the 

 sheath of the middle one usually shorter than the internode ; ligule 

 truncate, laciniate, 1 mm. long; blades flat, 5-15 cm. long, 3-4 mm. 

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

 mostly in fours, the longest 6-10 cm. long, bearing 1-2 spikelets. 

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

 3-5-nerved, 6-7 mm. long, second oval, 7-nerved, 8 mm. long, joint 

 of rachilla 3 mm. long; floral ghime chartaceous, ovate-lanceolate, 

 5-nerved, 13 mm. long, awn 4-6 mm. long; palea 10 mm. long. 



Mexico (Oaxaca), Pringle 4897, growing at an altitude of 9500 

 feet. Professor Scribner identifies it as near B. gr-andiflorus Hook. 



12. B. unioloides (Willd.) H. B. K. Nov. Gen. et Sp. 1 : 151 

 (1815). Sohradee's Bromus. Eescue-grass. Festuca imioloides 

 AVilld. Hort. Berol. l:?,, t. S (1806). Bromus catliartictis Vahl, 

 Symb. Bofc. 2:22 (1790-94). CeratocMoa festucoides Beauv. 

 Agrost. 75 (1812). Ceratocliloa U7iioloides DC. Cat. Hort. Monsp, 

 92 (1813). Bromus Willdenoivii Kunth, Eev. Gram. 1: 134 (1829- 

 35). Ceratocliloa pendula Schrad. Ind. Sem. Hort. Getting. (1830). 

 B. Schraderi 'Kvini\\, Enum. PL 1:416 (1833). Bromus Haen- 

 Iceanus Kunth, Enum. PI. 1:416 (1833). CeratocMoa australis 

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



A stout erect annual, 60-90 cm. high. Sheaths shorter than the 

 internodes, often pubescent, throat sparingly ciliate, ligule 3-5 mm. 

 long; blades flat, 4-5 in number, 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 

 scabrid above, about 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- 

 curved, 10 mm. long. Grain conduplicate. 



Washington (D. C).),Vasey 750; Mississippi, Tracy; Colorado, 

 Cassidy; Texas, Jenny. 



