264 Plants Collected in Paraguay. 



Paniciim Tirgatum, L., Sp. PL, 59. 



Caballero (405); Gran Chaco near Asuncion (538). January. 



Paiiicilin zizanioides^ H. B. K., Nov. Gen., i, 100. 



Gran Chaco near Asuncion (536); Pilcomayo River (1001). 

 January- April. 



Grows in masses along the edges of water-courses, in the water 

 and on the banks. It is an open, spreading plant, creeping at the 

 base, S^-S dm. high. Leaves 7-13 cm. long, amplexicaul at the 

 base of the blade. Panicle 10-13 cm. long, with several, unequal, 

 nearly erect spikes. Spikelets scattered along the rachis, usually 

 2 together, 1 on a pedicel 1 mm. long, and the other on a pedicel 5 

 mm. long. Lowest glume | as long as the spikelet, 3- or obscurely 

 5-nerved, infolding the spikelet at the base. All the glumes gla- 

 brous. Whole plant glabrous except on the margins of the leaf 

 sheaths. 



Faiiicum, sp. 



Caballero (521). January. 



Oplismenus setarius (Lam.), R. & S., Sjst. Veg., ii, 481. 

 Asuncion (248 a); Luque (315). December. 



ChamaerapUis caudatus (Lam.), Britton. 

 Panicum caudatum, Lam., EncycL, iv,'2. 



Pilcomayo River (1575). January-February. 



Csespitose. Culms numerous from a hard base, strict, slender, 

 angular, mostl}^ glabrous. Leaves narrowly linear, glabrous, revo- 

 lute, nearly as long as the culms. Panicle spiciform, simple or sub- 

 simple, 4-8 cm. long. Spikelets whitish, 2 mm. long. Longest 

 setae about 1 cm. 



In hard soil on the campos of the Pilcomayo River. 



Cliamaerapliis glauca (L.), Kuntze, Rev. Gen. PL, 767. 

 Near Asuncion (540). December-April. 



CliamaBrapIiis Italica (L.), Kuntze, L c? 

 Asuncion (207). November-December. 



