Plants Collected in Paraguay. 253 



C'yperiis polystacliyus, Rottb., Descrip. Icon., 39, t. 2, f. 1. 

 Asuncion (84 a, 84 b, and 566). December. 



Cyperus prolixus, H. B. K., Nov. Gen., i, 206. 



Caballero (432). January. 



Stems stout, triquetrous, rough near the bracts, 3-4 dm. high, 

 branching at the summit into a long decompound umbel. Rays 

 triquetrous, 8-10 or more, 12-24 cm. long, and again branching 

 into 2-6 raylets, which are 6-10 cm, long. Flowers in densely 

 crowded panicles. Spikelets loosely 5- or 6-flowered, on bracted 

 pedicels 2 or 3 mm. long, the rachis flexuous. Glumes 5-8-nerved 

 on the back, membranous on the margins, 3-4 mm. long. Involucral 

 bracts foliaceous, not sheathing, 7 or more, 1 or 2 of them longer 

 than the inflorescence ; inyolucels shorter than the raylets. The 

 plant forms a very large, widely spreading inflorescence. 



C'yperus radiatus, Vahl., Enum., ii, 369. 



Pilcomayo River (1068). January-April. 



Stems several, glabrous, striate, triquetrous below, compressed 

 above, 6-7 dm. high. Leaves nearly or quite as long as the stems. 

 Inflorescence in simple umbels, the spikes numerous and crowded, 

 radiating from the summit of the rays. Rays unequal. Spikes 

 somewhat cylindrical, 1^-2 cm. long. Spikelets 2-3 mm. long, 

 10-14-flowered, on peduncles of about the same length; flowers 

 minute, crowded, the glumes squarrosely spreading. Bracts numer- 

 ous, foliaceous, much longer than the flowers. Stems and leaves 

 straw-colored when dry, and the flowers yellowish-green. 



Cyperus Surinamensis, Rottb., Descrip. Icon., 35, t. 6, f. 5. 



Asuncion (244 a and 564); Pilcomayo River (1562). December- 

 January. 



Cyperus, Sp. 



Central Paraguay (83). 



Related to C. Surinamensis and C. Luzulde, Appears to be the 

 same as a plant collected by Schweinitz in Surinam. 



Kyllingia odorata, Vahl., Enum., ii, 289. 

 Asuncion (60). November. 



