﻿446 Nash : The Genera Chloris and 



Arizona: J. T. Rothrock, 1874, no. 578. Gardiner's Spring, 

 C. G. Pringle, June 24, 1882. Fort Huachuca, T. E. Wilcox, 

 1891, no. 79. Tucson, J. W. Tourney, Aug. 25, 1891, no. 150. 



Mexico: Chihuahua, C. G. Pringle, Sept. 20, 1885, no. 474. 



10. Chloris Prieuri Kth. Enum. PI. 1 : 266. 1833. 



Culms 4-10 dm. tall, at first erect, finally decumbent at the 

 base and rooting at the lower nodes ; nodes 4—6 : culm leaves 

 4-6 ; sheaths shorter than the internodes, keeled, at least toward 

 the summit, smooth, papillose-hirsute on both margins at the sum- 

 mit, otherwise glabrous; ligule a scarious ciliolate ring, about .5 

 mm. broad; blades 1.5 dm. or less long, 3-6 mm. wide, smooth 

 beneath, rough above and on the margins, the upper surface papu- 

 lose-hirsute toward the base with long hairs : inflorescence at 

 length exserted ; spikes 4-15, 6-9 cm. long, erect, the rachis 

 strongly hispid, especially on the angles : spikelets, exclusive 01 

 the awns, about 4 mm. long : scales 7-9, the upper ones much 

 the smaller, the uppermost scale often reduced to a mere awn ; 

 outer empty scales acuminate, awn-pointed, the first about one 

 half as long as the second, which is 2.5-3 mm. long ; third scale, 

 exclusive of the awn, 3-3.5 mm - l° n g> * n Sl( ^ e v * ew narrowly oblong 

 and about .5 mm. broad, acute, the callus short-pilose, a row o 

 dark glands on each side of the glabrous midnerve, the latera 

 nerves glabrous below the middle, pilose above, the hairs increas- 

 ing in length toward the summit, where they are about 1 mm. long, 

 the awn inserted just below the apex, 8-15 mm. long, the palet 

 shorter than the scale, gland-bearing between the nerves ; re- 

 mainder of the scales much reduced in size, sometimes mere rudi- 

 ments, the awns successively shorter. 



Al 



ballast at 

 McCarthy 



Chas. Moh 



EUSTACHYS Desv. Nouv. Bull. Soc. Philom. 2. 188. i^ 10 



[Schultesia Spreng. PL Pugill. 2 : 17. 181 5 



Tufted perennial sometimes glaucous grasses with much com 

 pressed smooth and glabrous culms and sheaths, the former otten 

 2-edged, the latter crowded at the base of the culm and strong y 

 equitant, leaves flat, or, when dry, folded, obtuse, and a term * na '^~ 

 florescence composed of erect or ascending I -sided spikes, dt & 

 tately arranged in 1 or occasionally in 2 whorls, or rarely reduCt 

 to i or 2 spikes. Spikelets alternately arranged in 2 rows on 



