628 POACE^. 



glumes linear, obtuse, 5-nerved, first 4 mm. long, second about 

 5 mm. long; floral glume about G mm. long; palea 6.5 mm. long, 

 spatulate-linear before spreading, revolute. 



Mexico, Pringle 2525 in 1889. 



Moist banks near Monterey. 



2. B. Mexicana (R. & S.) Link, Hort. Berol. 1:41 (1827). 

 Festuca Mexicana E. & S. Syst. 2:732 (1817). F. scahra 

 Lag. Gen. ot Sp. Nov. 4 (1816). 



A slender branching perennial, 20-30 cm. high, with a few root- 

 stocks. Culms slender, nodes smooth. Sheaths shorter than the 

 internodes; ligule about 0.5 m.ni. long; blades mostly fiat, scabrid, 

 pungent-pointed, 3-4 cm. long, 1.5-2.5 mm. wide, tapering 

 towards the base. Spikes bearing 1-3 erect linear-lanceolate spike- 

 lets, 3-6-flowered, 1.5-2 cm. long; empty glumes ovate-lanceo- 

 late, abruptly pointed, first 5-nerved, 5-6 mm. long, second 7-9- 

 nerved, 7-8 mm. long; floral glume elliptical, 7-nerved, 8 mm. 

 long, the terminal awn 2-4 mm. long. 



Mexico, Pringle 4231. 



Tribe XIL— HORDEJE. 



Spikelets 1-many-flowered, sessile in the alternate notches o\ 

 the rachis of a simple spike, rachilla usually produced beyond the 

 upper floret. 



130. (265). LOLIUM L. Sp. PI. 83 (1753). Cm;^a/ia Schrank, 

 Baier. FI. 1:102, 382 (1789). Cryptnrus Link, Linna?a, 17:387 

 (1843). Artltrochortus Lowe, Hook. Kew. Journ. 8:301 (1856). 



Spikelets several-flowered, sessile, single (or abnormally branch- 

 ing) at each joint of the single spike, distichous, compressed, turn- 

 ing one edge (or the backs of one row of glumes) to the rachis ; 

 rachilla articulate between the florets, which are perfect, or the 

 upper one imperfect. Glumes firm, 5-7-nerved, round on the 

 back, not keeled, obtuse, acute, acuminate or the nerves above ex- 

 tending into an awn; the lower glume of the lateral spikelets and 

 the 2 lower glumes of the terminal spikelets empty; palea shortei 

 than the floral glume, narrow, 2-keeled. Stamens three. Styles 



