154 Plants Collected in Paraguay. 



ligule bilabiate, one lip with 3 and one with 2 small teeth. Paleae 

 membranaceous, glabrous, acuminate, longer than the achenia, 

 Achenia T or 8 mm. long, muricate, long-beaked. Pappus white or 

 tawny, plumose. This plant has a milky juice, and the roots are 

 ver}^ thick and large. The roots are sometimes used as chicory. 



Soiiclius oleraceus, L., Sp. PI., 794. 



Asuncion (193). November. 



Picrosia longifolia, Don., Trans. Lin. Soc, xvi, 183. 



Asuncion (146); Pilcomayo River (1522). November-May. 

 = Balansa 861, and Mandon 28t. 



Picrosia differs from Hypochderis in having entire leaves, the in- 

 volucral scales in one series, naked receptacles, beaks of the achenia 

 very long and filiform, and the ligules nearly equally 5-toothed. 

 The species here noted has weak, glabrous stems and heads solitary 

 on long, naked peduncles. The heads when fully mature are 3 cm. 

 long, subtended by several small bracts. Achenia fusiform, 14 rib- 

 bed, with a beak 5-8 mm. long. Pappus plumose, tawny. Ligules 

 conspicuous, pure white. Juice milky. Leaves linear-lanceolate 

 or oblanceolate, 10-30 cm. long, the radical with extremely long, 

 slender petioles, and the cauline sessile and hastate. It often occurs 

 in the streets of Asuncion, creeping from under the curbstones of 

 the sidewalks, so weak that it can scarcely keep itself erect. I found 

 it on the banks of the Pilcomayo with stems nearly 12 dm. long, 

 reclining on the ground at full length. It is called chicory by the 

 natives, and the roots used like those of no. 146 as a substitute for 

 coffee. 



CAMPANULACEiE. 

 Lobelia Xalapensis, H. B. K., Nov. Gen., iii, 315. 



Caballero (443). January. 



20-30 cm. high. Small blue flowers in terminal racemes. Stem 

 and branches slender, glabrous. Leaves alternate, ovate-deltoid, 

 subcordate or truncate at base, irregularly crenate-dentate, 1-2 cm. 

 long, 8-15 mm. broad, shortly petioled. Branches naked for 7-10 

 cm. at the summit. 



Ifalilenbergia linarioides (Lam.), A. D. C, Mon. Camp., 158. 



Gran Chaco, near Asuncion (1523); Pilcomayo River (919). 

 February -= Balansa 2149. 



