ON THE PKOTEACEyE OF JUSSIEU. 163 



10. R. sessilifoUa, foliis quaternis subsessilibus cuneato- 

 oblongis subacuminatis integerrimis, racemis terminalibus 

 verticUlatis umbellatisve. 



Ronpala sessilifolia. Rich, in Act. Soc. Hist. Nat. \, 

 p. 106. Poiret, Encyc. Botan. 6, p. 316.* Willd. Sp. 

 Fl. \,p. 537. 



Ropala hamelisefolia. Rudge, Guian. I, p. 22,* t. 31. 



Hab. In Americse Bequinoctialis Guiana Gallica. (v. s. 

 in Herb. Banks, et Lamb.) 



31. KNIGHTIA. 



Char. Gen. Calyx tetraphyllus, regularis, foliolis revo- 

 liitis. Stamina calyci extra medium inserta. Glandtdce 

 hypogynse quatuor. Ovarium tetraspermum, sessile. 

 Stigma verticale subclavatum. Folliculm coriaceus, styli- 

 gerus, unilocularis. Semina apice alata. 



Habitus. Arbor excelsa. Folia sparsa, serrata. Racemi 

 axillares, jloribus geminatis, paribus unibracteatis. Folli- 

 culi oblongi, tomentosi. 



Genus proximum Rhopalse, distinctum, Seminibus qua- 

 ternis, apice solum alatis. 



This genus, which was discovered by Sir Joseph pm 

 Banks, is, with his approbation, named in honour of his 

 friend Thomas Andrew Knight, Esq., the author of many 

 valuable essays on Vegetable Physiology, published in the 

 Philosophical Transactions. 



For the figure here given I am also indebted to the 

 liberality of the illustrious President of the Royal Society, 

 who has enabled me to complete the account of this re- 

 markable plant, by permitting me to copy Dr. Solander's 

 description, which I was the more desirous to give, as it 

 exhibits a specimen of the accuracy with which subjects of 

 natural history were investigated in that celebrated voyage ; 

 of whose important results it is to be lamented so little is 

 known to foreign naturalists, though in this country they 

 have ever been open to the public, and in the most ad- 

 vantageous manner. 



