Plants Collected in Paraguay. 271 



Rottboellia Balansae, Hack., in Mart. Fl. Bras., ii, pt. 3, 312. 



Near Yilla Rica (542). January. = Balansa 291. 



Culms hard and dry, 1-lf m. high, growing in tussocks on the 

 campo near Villa Rica. This is one of the most common grasses 

 upon the plains of Paraguay, and usually presents a stiff, harsh 

 aspect, affording but little nutriment for cattle, except when very 

 young. 



Rottboellia compressa, L. f., SuppL, 114. 



Pilcomayo River (8*74). January. = Balansa 646. 



Aristida iniplexa, Trin., Act. Petrop., 1836, 48. 



Between Yilla Rica and Escoba (488). January. 



Culms nearly or quite glabrous, 1 m. or more in height, csespitose. 

 Leaves as long as or longer than the culms, narrowly linear, very 

 revolute, appearing nearly cylindrical when dry. Panicle close, 

 25-30 cm. long. Empty glumes 2-2|- cm. long, bluish, rough on 

 the keel and with a rough bristle. Awns of the flowering glume 

 nearly 10 cm. long, straight, much twisted. A strawy-looking 

 species among the hills and woods. 



Aristida coniplanata, Trin,, 1. c, 1829, 85. Ex descr. 



Asuncion (648). April. 



A slender species with nearly glabrous compressed culms 5 or ft 

 dm. high. Leaves narrowly linear, 2 mm. broad, nearly or quite 

 glabrous, tapering to a long, hair-like point, very revolute. Panicle 

 contracted, 15-20 cm. long, l-lj cm. wide, with 3 or 4 branches. 

 Empty glumes purplish, membranous, barely bristle-pointed, the 

 lower 1-nerved or obscurely 3-nerved at base, 12 mm. long. Awns 

 20-25 mm. long, very slender, not twisted, straight. A delicate, 

 caespitose plant, occurring in old fields. 



8porolt)OlllS Indicus (L.), R. Br., Prodr., i, 170. 



Asuncion (365); Caballero (551). December-February. 



Cllloris distictiopbylla, Lag., Gren. et Spec, Nov. 4. 

 Asuncion (142). November. 



Ctiloris polydactyla (L.), Sw., Prodr., 26. 



Pilcomayo River (1586). April. Named by Dr. Geo. Yasey. 

 A very handsome species growing along the borders of the Pilco- 



