AGROSTIDE^. 309 



Arizona, Tourney 740, Jones 4219; Mexico, Pringle 1427, 2346, 

 2356. 



4. E. grandis (Vasey). Muhlenhergia grandis Yasey, Coutrib. 

 U. S. Nat. Herb. 1:283 (1893). 



Au erect stout light green perennial, 120-160 cm. high. Cuhns 

 solid, compressed. Sheaths flattened; ligule firm, 3-5 mm. long; 

 blades revolute or involute or couduplicate, hard, scabrous, 40-70 

 cm. long, 5-10 mm. wide. Panicle terminal, linear-lancoolate, 

 hrownish-yellow or purple, 40-70 cm. long; rays erect, 10-13 cm. 

 long, numerous and freely branching and with the spike! ets con- 

 cealing the main axis, flower-bearing to near the base. Spikelets 

 on pedicels 1-4 mm. long; empty glumes equal, scabrid, ovate- 

 lanceolate, nerveless or very obscurely 1-nerved, about 2 mm. long; 

 floral glume ovate, acute, obscurely 3-uerved, about 2 mm. long, 

 the awn 10-18 mm. long; palea as long as its glume. Grain linear, 

 1.4 mm. long. Nearly allied to E. disticJiojjJiglla Vasey. 



Mexico, Palmer 515, 515a, Pringle 1760, 2765. 



5. E. macroura (Kunth) Benth. Journ. Linn. Soc. 19:87 

 (1881). Cinna macroura Kunth, Rev. Gram. 1:67 (1829). C. 

 stricta Kunth, Rev. Gram. 1 : 67 (1829). 



Perennial; culms erect, rigid, simple, smooth. 

 90-120 cm. high. Sheaths nearly smooth; ligule 

 lanceolate, split, 2-3 cm. (I) long; blade loug, 

 scabrous above, involute, with long tapering points. 

 Panicle plumbous, spikelike, dense, 30 cm. long, 

 1 cm. broad. First and second glumes lance- 

 linear, equal or subequal, 4-4.5 mm. long; floret 

 3.5-4 mm. long, linear, abruptly acute when 

 spread ; palea as long and as wide as its glume, yig 53 —Epkam- 

 Anthers 5 mm. long. pe» macroura. 



^ ^r • -r. o T. . Spikelet.(Scrih- 



Central Mexico, Parry ct- Palmer 919 in ner.) 



1878. 



Under this name Hemsley in Biol. Cent. Am. includes No. 940 

 of Parry & Palmer. The plant with the latter number in the her- 

 barium of Harvard University is very different : among the differ- 

 ences the ligule is 6 mm. long, spike 18-20 cm. long; empty 



