FKsrrcK.E. 611 



green, pilose, 3-6 cm. long, 2 mm. wide. Panicle erect, dense, 

 tinged with purple, obovate-cuneate, 4-6 cm. long. Spikelets. 

 6-9-llowered, joint of rachilla 2.5 mm. long; first glume narrowly 

 lanceolate, nearly 10 mm. long, 1-nerved, second linear-lanceolate, 

 3-nerved, about 14 mm. long; floral glume linear-lanceolate, 

 7-uerved, about 15 mm. long, including the two hyaline points, 

 awn 12-18 mm. long; palea linear-lanceolate, ciliatc-pectinate, 

 13 mm. long. 



Kansas; California, Sones. 



Introduced from Europe. 



2. W. RKJiDUs Koth. Koem. & Ust. Mag. Bot. 4: 21 (1790). B. 

 maximvs Desf. Fl. Atl. 1:95. (1800). B. amhigcns Jord. Xym. 

 Consp. 8-U (1878). B. asperijxs Jord. I. c. 



An erect annual, 30-50 cm. high. Sheatlis scabrid; ligule 

 broad, lacerate, 4 mm. long; blades of the culm dark green, sca- 

 brous or i)ubescent, 5-15 cm. long, 4-7 mm. wide. Panicle erect, 

 12-20 cm. long, rays mostly in twos and threes, the longest 4 cm. 

 long, each usually bearing a single nodding fipikelet. Spikelets 

 scabrid, 5-8-flowered; joint of rachilla 4 mm. long, empty glumes 

 narrow, first 1-nerved, 14-18 mm. long, including the narrow apex, 

 second linear-lanceolate, 5-nerved, 18-25 mm. long, including the 

 narrow apex; floral glume linear-lanceolate, convex below, com- 

 pressed above, 5-7-nerved, 22-27 mm. long to the tip of the two 

 slender teeth (4 mm. long), awn 35-45 mm. long; palea linear, 

 pectiiuite-ciliate, 15 mm. long. 



Michigan, II. E. Owen; Colorado, Cassidy; California, Sanes, 

 Pringle. * 



Colorado, California, and Arizona, introduced from Europe. 



3. B. aleutensis Trin. Ledb. FI. Ross. 4: 3G1 (1853). 



Culms smooth, erect, stout, 9(t-120 cm. higli. Slieatlis smooth, 

 shorter than the internodes; ligule fringed, 5 mm long; l)Iades fiat, 

 scabrous. 30-40 cm. long, 7-10 mm. wide. Panicle erect, simple,, 

 lanceolate, 15-25 em. long, rays scabrous, stifi", single or in pairs, 

 the longest 5-8 cm. long, bearing 2-3 spikelets, other rays mostly 

 bearing single spikelets. S]>ikelets erect, com})ressetl, 5-7-fiowered, 

 joint of rachilla 5 mm. long, first glume ovate, acute, 5-nerved, 10- 



