Plants Collected in Paraguay. 169 



This plant is aiore robust, with much more showy flowers than 

 no. 56, and is common in waste grounds and copses about Asuncion 

 (634 and 786). April-August. = Balansa 2031 and 2039. These 

 were distributed as H. Indicum, L. 



Heliotropium iniiiidatiiiii, Sw., Flor. Ind. Occ, i, 343. 

 Asuncion (77); Gran Chaco (77 a). November-January. 



Heliotropium persicariaefoliiim (D.C.), Britton. 



Heliophytum persicaricefolium, D.C., Prod., ix, 556. 



Caballero (409); Asuncion (754). January-June. 



This shrub sometimes attains a height of 2 m. Flowers small, 

 white, in elongated bifid spikes. In open grounds, roadsides near 

 San Lorenzo and Caballero. 



Heliotropium fruticosum, L., Sp. PL, Ed. 2, 187. Ex descr. 



Pilcomayo River (1528). January. = Balansa 2035. 



Fruticose. Stems slender, branching, appressed-hispid. Flower- 

 ing branches opposite, 15-25 cm. long, covered with small bracts for 

 their whole length. Spikes at their summit, short, solitary, more 

 or less scirpoid. Flowers comparatively large, white Calyx lobes 

 unequal, oblong-lanceolate, about equal to the tube of the corolla, 

 pubescent. Fruit pubescent, without a beak, splitting into 4 nut- 

 lets, each of which has a large pit on its face. 



CONYOLYULACE^. 



Ipomoea acuminata (Vahl.), R. and S., Syst., iv, 228. 



Asuncion (699). 



A very pretty species, with slender stems and lilac flowers, twin- 

 ing over bushes and small shrubs. Common in Paraguay, and 

 blossoming from November to May. 



Ipomcea argyreia (Chois.), Meisn. in Mart. Fl. Bras., vii, 246. 



Caballero (583 and 583 a). January. 



One of the shrubby Ipomoeas, of which several species occur in 

 the country. This grows on the railroad track near Caballero, and 

 is from 9 to 12 dm. in height. Leaves alternate, entire, oblong, 

 obtuse or acute, mucronate. Corolla large, rose-colored. 



