132 Plants Collected in Paraguay. 



lobes ciliate, persistent, half as long as the corolla. Lobes of corolla 

 6, acute, hairy on the lower side. Style 3-divided, with 3 capitate 

 stigmas. Fruit murieate or hispid, 3-carpelled, 3-celled, 1 seed in 

 each cell. Seeds pitted. 



Ricliardia grandiflora (C. and S), Britton. 

 Richardsonia grandiflora, C. and S., Linnsea, ill, 351. 



Between Escoba and Caballero (422 and 413). January. 



Differs from the preceding species in having stems setosely hispid, 

 linear leaves 3-4 cm. long, very large heads, 2-4 acuminate, lanceo- 

 late involucral bracts 2 cm. long, many acuminate hispidly ciliate 

 floral bracts, and purplish or rose-colored flowers with a corolla 

 10-13 mm. long. The seeds are covered with pellucid, glandular 

 tubercles. This plant grows in red, clayej^ soil on the railroad track 

 between Escoba and Caballero, its fine large flowers forming a great 

 contrast to the rough stems and bracts. 



CALYCERE^. 

 Acicarpha triliuloides, Juss., Ann. Mus., ii, 348, t. 58, f. 1. 



Buenos Aires and Asuncion (2). 



Common about Buenos Aires, and covering all the waste grounds 

 in and around Asuncion. Its spiny leaves and burrs make it a 

 great nuisance. It continues to flower and fruit all the season from 

 early October to May. 



COMPOSITE. 

 Pacourina edulis^ Aubl., PI. Guian., ii, 800, p. 316. 



Asuncion (224 a). December. 



The main difference between this and the following form lies in 

 the absence of lobes and spines on the leaves and scales. Leaves 

 oblong-spatulate or lanceolate, 10-25 cm. along, sparsely spiny- 

 dentate. 



Pacourina edulis^ Aubl., var. spinosissima, Britton, n. var. 



Similar to P. edulis, Aubl., but witb elongated, lanceolate-oval leaves, often 

 a foot or more long, which are deeply laciniate into triangul-ar-lanceolate, 

 spine-pointed lobes ; outer bracts of the involucre tipped with short spines. 



Asuncion (224). December. Same as Balansa's 862. This ap- 

 pears to be different from P. cirsiifolia, H. B. K. — N. L. B. 



