SCHOMBURGK's GUIANA PLANTS. 241 



3— 4-pollicaria — British Guiana, Schomburgk^ n. 153 This 



plant furnishes the celebrated Wourali poison, referred to 

 by M. Schomburgk in the narrative of his expedition. 



538. S. ? cogens {sp. n.); ramis scandentibus petiolisque 

 puberulis, foh'is breviter petiolatis lanceolate- v. oblongo-ova- 

 tis acuminatis basi rotundatis coriaceis 3 — 5-nerviis supra 



glabris subtus puberulis v. demuni glabratisj floribus 



Folia 4 — 6-polIicaria — British Guiana, Sckombicrgk) n. 156. 

 This plant, according to M. Schomburgk, is a ligneous 

 twiner like the Wourali, and the juice is mixed with that 

 poison to give it consistency. On this account, as well as 

 from the peculiar venation of the leaves, 1 have little hesita- 

 tion in referring it to Strychnos^ although I have seen neither 

 flowers nor fruit. 



539. Pagamea Guianensis, Aubl. PI. Guian. i. 112. t 44. 

 — A small tree in sandy soils, British Guiana, Schomburgk^ n, 

 510 (in some sets corrected by mistake to 467) and 985. — 

 French Guiana, Leprieur. — This genus belongs to the tribe 

 of the Stryclmece, and not to the Gartnerete, as will appear 

 from the following description of the ovary and fruit. Ova- 

 rium breviter bilobum, biloculare, loculis multiovulatis, 

 placentis carnosis, ovulis minutissimis, vix conspicuis. Bacca 

 (2 — 3 lin. diametro) obovoideo-globosa, dipyrena v. abortu 

 monopyrena, pyrenis unilocularibus polyspermis. Placentae 

 carnosse undulatae. Semina numerosissima, minuta, in pla- 

 centis imbricata, pulpa nidulantia. 



AP0CYNE7E. 

 Tribe, CARissEiE. 



540. Couma Guianensis, Aubl. — Endl, Gen. p. 579.— 

 French Guiana, Leprieur, Herb. Par. n. 100. 



541. AUamanda grandifora, Lam. Diet. iv. p. 601 — 

 French Guiana, Leprieur, Herb. Par. n. 144. 



Tribe, Ophioxyle^. 



542. Rauwolfia polyphylla (sp. n.) ; glabra, foliis verticil- 

 Vol. Ill,— No. 21. 2 I 



