242 Plants Collected m Pai^aguay. 



just under the flowers. Flowers large, spicate, 5-15 on the spike. 

 Perianth with a closed, slightly recurved tube about 2 cm. long, 

 6-lobed, the lobes as long as the tube, of a fine bluish-purple tint, 

 rounded or obovate, the 3 exterior somewhat larger, the uppermost 

 marked by a round yellow eye in the centre ; 3 of the stamens 

 longer than the other 3, inserted near the sinuses of the lobes; 

 anthers dark blue. Style longer than the stamens in all the speci- 

 mens that I collected ; stigma capitate, hairy. Glandular on the 

 perianth lobes and also on the tube, style, and filaments. This 

 plant is popularly known as Aguapi, and' also as Camalote, names 

 which appear to be applied indiscriminately to all the species of 

 Eichornia and Pontederia in Paraguay. 

 Some of this was distributed as E. azurea. 



Piaropus azureus (Sw.), Raf. Fl. Tell., Part 2, 81. 

 Eichornia azurea, Kunth., Enum., iv, 129. 



Pilcomayo River (859 and 964). March. 



Heterantliera reniformis, R. and P., Fl. Peruv., 43. 

 Asuncion (320). December. 



XYRIDE^. 

 « 



Named by Mr. Heinrich Ries. 



Xyris toi'tula, Mart., Flora, xxiv, Bibl. 2, p. 55. 



Caballero (520). January. 



A species about 3 dm. high, with slender terete, twisted scapes 

 and small, ovoid, 6-10 flowered heads. Leaves about half as long 

 as the scapes, twisted spirally, rigid, erect, sulcate, 1 mm. or less 

 in width. Scapes and leaves rising from a compact, dense tuft of 

 black bracts. 



Xyris connnilliis, Kunth., Enum., iv, 12. 



Luque (329). December. = Balansa 562 a. 



Scape 3 to 6 dm. high, slightly 2-winged above, 1-angled below, 

 a little rough on the angles and wings. Heads somewhat conical, 

 I4-I4 cm. long and 1 cm. broad. Scales orbicular, obtuse, fuscous 

 on the edges and with a cinereous rasped space in the centre near 

 the apex. Lateral sepals with showy fringes on the keels. Leaves 



