S44 POACE^. 



lute or flat, often recurved, 1 5-2.5 cm. long, about 1.5 mm. 

 wide. Panicle simple, racemose, 3-6 cm. long; rays single, subse- 

 cund, recurved, flower-bearing throughout, 1-2 cm. long. Spikelets 

 mostly sessile; empty glumes subequal, 1-nerved, 1.3-1.6 mm. long, 

 half of which is the awn; floral glume thin, linear-lanceolate, pubes- 

 cent on 2 of the lateral nerves, 5-nerved, the intermediate lateral 

 nerves obscure, 2 mm. long, the awn 1-20 mm. long; palea linear- 

 lanceolate, 2-toothed, as long as its glume. Grain linear, 1.5 mm. 

 long. 



Mexico, Pringle 1435, 1845; the later has the longer awns with 

 floral glume less pubescent. 



Mexico. 



11. M. stipoides (H. B. K.) Trin. Unifl. 194 (1824). Podo- 

 scBmumstipoides II. B. K. Nov. Gen. et. Sp. 1:131 (1815). 



A strict tufted grass 40-60 cm. high. Culms rather stout. 

 Leaves of the culm 4, sheaths ribbed, mostly longer than the inter- 

 nodes; ligule narrow, 5-7 mm. long; blades strict, scabrid, invo- 

 lute, 6-15 cm. long. Panicle simple, narrow, 6-10 cm. long; rays 

 in threes, the longest 5-6 cm. long, including the 3-4 spikelets on 

 the outer half. Spikelets olive-green, brown at the base, empty 

 glume 1-nerved, ovate-lanceolate, first 5 mm. long, second 7 mm. 

 long; tuft of hairs at base of floret 2 mm. long, floral glume 13 mm. 

 long, 5-nerved, the twisted awn rather stout, 12-15 mm. long, 

 starting 4 mm. below the slender apex of the glume; palea about 

 the length of its glume. 



Growing at the altitude of 10,300 feet. 



Mexico, Pringle 4005. 



12. M. sobolifera (Mulil.) Trin. Unifl. 189 (1824). 



Agrostis soMifera Muhl. ; Willd. Enum. 95(1809). Triclio- 

 chloa soholifera Trin. Fund. Agrost. 117(1820). Ciuua soholifera 

 Link, Ilort. Berol. 1: 71 (1821). 



A slender ascending perennial, rarely branching, 30-60 cm. 

 high, from creeping scaly rootstocks. Sheaths longer than the 

 internodes; ligule a mere ciliate ring; blades flat, scabrid, pungent- 

 pointed, 5-10 cm. long, 3-5 mm. wide. Panicle very simple, slen- 



