810 POACE.E, 



glumes 5-6 mm. loug, floral glume 7 mm, long with a miicro; 

 palea 5.5-6 mm. long. Like the latter j^lant in the herbarium of 

 Harvard are others from Bolivia. Xo. 1, Dr. E. Palmer, Chihua- 

 hua, Mexico (1885), is named E. macroura Benth. This seems to 

 be near Xo. 919 of Parry & Palmer; in this the spike is dense, 

 6 mm. wide; empty glumes a little longer than in 919, including 

 a bristle point, apparently not more than a variety. 



6. E. Bourgaei Fourn. Hemsl. Biol. Centr. Am. Bot. 3 : 548 

 (1880). Sjjorobohis comjjianafus Scribu. ined. 



A rather stout erect perennial, 150 cm. high. Culms smooth, 

 compressed below. Sheaths smooth, keeled, longer than the inter- 

 nodes; ligule hyaline, 10 mm. long, acute or lacerate; blades flat, 

 60 mm. long, 3-6 mm. wide, attenuate-pointed, scabrous on both 

 sides. Panicle difl'use, 45 cm. long; rays irregularly scattered on the 

 rachis, capillary, bearing spikelets on the outer half, the lower 10- 

 15 cm. long. Spikelets nearly terete, 1-flowered, 1.5-2 mm. long; 

 empty glumes ovate to oblong, obtuse, subequal, 1-nerved, equalling 

 the floret or a little shorter; floral glume broadly obtuse, occa- 

 sionally mucronate; palea as long as its glume. Grain nearly as 

 long as the floral glume. Distributed as SporohoJus co/njjhmatus 

 Scribn. n. sp. 



Mexico, Pi'ingle 3335. 



Under cool cliffs, near Guadalajara, State of Jalisco. 



Scribner says : " This grass differs from Epicampes as described 

 by Bentham & Hooker in the widely diffuse panicle The irregu- 

 lar disposition of the branches, the firm texture of the floral glume, 

 large palea and terminal awn or mucro, separate it from Agrostis. 

 The adherent pericarp alone separates it from Sporobolus. From 

 Miihlenhergia it is distinguished by its loosely enclosed cai*yopsis." 



7. E. rigens Benth. Journ. Linn. Soc. 19:88 (1881). Cinna 

 macroura Thurb. not Kunth, S. Wats. Bot. Calif. 2: 276 (1880). 



Perennial; culms rigid, erect, smooth, 90-120 cm. high. Sheaths 

 longer than the internodes, loose, smooth or glabrous; ligule 4-6 

 mm. long; blades scabrous, rigid, narrow, strongly involute, apex 

 attenuate, 10-30 cm. long. Panicle exserted or witli the base in- 

 cluded, erect, dense, spikelike, interrupted below, 20-50 cm. long. 



