142 Plants Collected in Paraguay. 



Baccbaris notosergila, Gris., Symb. Flor. Arg., 183. 



Pilcomayo River (1009). April. 



Called by our Guarani peons Escoba de los Indios, or Indian 

 broom, because it serves admirably for making small brooms or 

 brushes. A dry, sage-like plant, about 6 dm. high, very branching 

 and bushy. Shrubby, with a terete, slate-colored stem. Leaves 

 square, sharp-angled phyllodia, without blades. Corolla very small, 

 the tube green below and whitish above, with minute lobes, buried 

 in the abundant silky-capillary pappus. Yery common on the cam- 

 pos at the Pilcomayo Falls. 



BaccliaTis oxyodonta^ D.C., 1. c, 404. 

 B. triplinervia, D.C., 1. c. 



Asuncion (135) ; Pilcomayo River (1515). November-May. 



6-9 dm. high, angular, glabrous or somewhat pubescent among 

 the inflorescence, both stem and leaves very viscous. Leaves alter- 

 nate, long-petioled, 3-nerved, acute at either end, entire or sparsely 

 serrulate, 4-10 cm. long, 6-15 mm. broad, black glandular spotted 

 on both sides. Heads about 6 mm. long, in small terminal corymbs ; 

 scales in about 3 rows, acute, 1-nerved ; pappus tawny. This plant 

 grows in low wettish grounds around Asuncion, and also occurs in 

 the great laguna on the Pilcomayo River. 



Baccliaris Platensis, Spreng., Syst., iii, 165. 



Pilcomayo River (1022). May. 



Stem shrubby, strict, branching, glabrous below, pubescent above, 

 striate, angular, about 9 dm. high. Leaves 5-10 cm. long, 1 mm. 

 to 2 cm. wide, opposite, oblanceolate, puberulent, serrate above, 

 1-nerved or the lowest 3-nerved, abruptly acute at the apex and 

 sloping at the base into a short petiole. Heads not quite 1 cm. 

 high, glomerate at the ends of the branches and projecting divari- 

 cately; scales in 4 or 5 rows, obtuse, ciliolate. Common on the 

 campo at the Pilcomayo Falls. 



Baccharis sessiliflora, Valil., Symb., iii, 97. 



Luque (1517). 



Baccliaris subopposita^ D.C., 1. c, 413. 



Asuncion (647 a); Pilcomayo River (1518 and 941). February- 

 April. 



It is possible that these numbers represent different species. The 



