166 Plants Collected in Paraguay. 



acuminately pointed at the apex, 3-6 cm. long, easily mistaken for leaves. 

 Seeds flat, wing-margined, oblong, narrowing towards the base, papillose, 5 

 or 6 mm. long ; coma white, plumose, 2-3 cm. long. 



Pilcomayo Falls, Pilcomayo River (1004). April. 



Exolobus patens, Four, in Mart. Fl. Bras., vi, pt. 4, 318, t. 94. Ex 

 descr. 



Pilcomayo River (1051). June. 



A branching liana, in deep woods, running 10 or 12 m. over large 

 trees, the stem 10-20 mm. in diameter. Flowers olivaceous in 

 color, rotate, 2J cm. in diameter when expanded ; petals acuminate, 

 and 3 or 4 times as long as the ciliate sepals. The stigma is sur- 

 mounted by a beautiful 5-pointed star. Follicle ovate, glabrous, 

 10-12 cm long, 6-8 cm. in diameter at the base, ridged by 4 sharp 

 longitudinal wings, with a partial, broader wing between two of the 

 others, the edges of all of them revolute. Seeds flat, obcuneate, 

 *r mm. long, with thick winged margins, the attached plume very 

 long and silky. 



LOGANIACEJE. 

 Spigelia Humlioldtiana, C. and S., Linnsea, 1833, p. 200. 



Pilcomayo River (966). March. 



A low plant occurring in deep woods. The corolla is white, the 

 flowers in terminal spikes 3-5 cm. long, two spikes together. Leaves 

 verticillate, in 4s, the lowest smaller and opposite. 



Buddleia tubiflora, Benth. in D.C. Prod., X, 433. 



La Plata, Arg. Republic, and Asuncion (33). = Balansa 1018. 



Buddleia Brasiliensis^ Jacq. ex Spreng., System., i, 430. 



Pilcomayo River (1521). = Balansa 1019. 



This differs from the species common around Asuncion (B. tuhi- 

 Jiora) in having the leaves more or less petioled, much smaller and 

 axillary cymes, and a much smaller corolla. Both have handsome 

 orange-colored flowers. B. tuhiflora is used medicinally as an 

 emollient by the Paraguayans. They flower from October to May, 

 and sometimes grow to a height of 2 or 3 m. 



