Plants Collected in Paraguay. 273 



hollow joints like a reed, often as much as 3 m. high. Leaves some- 

 what shorter than the culm, 2-3 cm. wide. Panicle very large, 

 loose and spreading, 20-40 cm. long. Spikes on long branches, 

 rising 1-3 or more together from the rachis, beginning to flower 

 half-way up. These branches are filiform, 10-20 cm. in length, 

 gracefully drooping. The specimens from Pirayu (614) had a 

 closer panicle, presenting a more compact and bristly appearance 

 than those of the Pilcomayo. 



Diplachne Terticillata, Nees. 



Pilcomayo River (981). April-June. 



Very common on the low grounds near the Pilcomayo River. 

 It grows 1-1^ m. high. Panicle strikingly glaucous, sometimes 

 over 30 cm. long, bearing from 35 to 50 slender spikes 5-10 cm. 

 long, rising singly or several together from the rachis. Panicle 

 rigid, 6-8 cm. broad ; spikes nearly erect. Spikelets 1^ cm. long, 

 appressed, on the upper side of a rachis scarcely ^ mm. wide, 4-8 

 flowers in a spikelet. Culm quite brittle at the joints, often branched 

 below and sending up several flower stems. 



This is very similar to, if not identical with, D. imhricata of 

 Texas and Mexico. 



Oynerium argenteum, Nees, Agrost. Bras., 462. 



Pilcomayo River (950). March-April. 



The well-known Pampas grass. It grows in large clumps all 

 along the Pilcomayo Ri\^er and down the Paraguay to Uruguay. 

 The culms sometimes measure 2-2^ cm. in diameter at the base, 

 and attain a height of 4^ m. The plumes are 5-7 dm. in length, 

 generally of a silvery-white, but frequently of a delicate rose tint. 

 The leaves are narrowly linear, running into a long sharp apex, 

 ^-1|- m. in length, rising in a rosette about the base of the culms 

 and gracefully curving over towards the ground. Usually several 

 culms grow together in a tussock. 



The masses of this showy grass impart a wonderful beauty to 

 the solitudes of the Pilcomayo forests, looking like plumed sentinels 

 guarding the entrance to nature's treasures. 



Gyiierium saccbaroides, H. B. K., PL ^Equin., ii, t. 215. 



Pilcomayo River (1065). June. 



Much inferior to no. 950 in beauty, but equally conspicuous. 

 Culms 3-5 m. high, over 2|- cm. thick at the base, not hollow, but 

 Annals N. Y. Acad. Sci., VII, April, 1893.— 18 



