Dec. 1803.] BOTANICAL SOCIETY OF EDINBURGH. 53 



Parkinsonia ACULEATA, L. 



Hab. — Frequent on bank of Rio Pilcomaj'o above " Las 

 Juntas." 



Cassia bicapsularis, L. 



Hab. — Common all along the lower Pilcomayo in open 

 scrubby places. 



A small shrub with spreading woody stems. The fruit 

 consists of an elongated pod, and each seed is contained 

 in a separate chamber. The seeds are albuminous, and 

 the embryo is very rich in chlorophyll, which is probaldy 

 to be correlated with the translucence of the surrounding 

 tissue. 



Cassia l^vigata, Willd. 



Hab. — Piio Paraguay and Pio Pilcomayo. 



Cassia occidentalis, L. 



Hab. — Eio Paraguay and Pio Pilconiayo. 



PiPTADENiA quadrifolia, N. E. Br. (n. sp.). — Arbor 

 inermis, foliis parvis, pinuis uuijugis ; foliolis unijugis, 

 oblique obovatis, obtusissimis, supra glabris, subtus pilis 

 minutis paucis ; petiolis petiolulisque puberulis, ad apices 

 glandula parva instructis ; spicis a.xillaribus, simplicibus, 

 cylindraceis, breviter pedunculatis ; pedunculis, calycibus, 

 corollisque omnibus puberulis ; calyce quam corolla 

 triplo breviore, quinquedentato ; petalis oblongis obtusis ; 

 staminibus exsertis, quam corolla subduplo longioribus ; 

 ovario stipitato, dense et appresse cano-tomentoso ; 

 legumine piano, scaberulo, fuliginoso ; seminibus com- 

 planatis, pallidis. 



Hab. — Eio Pilcomayo, Kerr, 1 ! 



Polia 1 poll, longa. Petiolis j poll, longis. Jugie 

 petiolis 2 lin. longis. Petiolulis i— f lin. longis, Foliolis 

 4-7 lin. longis, 3—5 lin. latis. Spicie 1—2^ poll, longa. 

 Calyx -3- lin. longus. Corolla li lin. longa. Stamina 

 2 lin. longa. Legumen li— 2 poll, longa, i pol^- ^'^ta. 

 Semina 2i lin. diam. 



Nearly allied to P.fcetida, Benth., but the leaves seem 

 always to be 1 -jugate; the leaflets are broader in proportion 

 to their length, more obovate and more obtuse than in 



