OF ARTS AND SCIENCES. 317 



genus. Rhomhospora of Korthals seems to be another Hedyotideous 

 plant, referred to the Cinchonece upon this sole technical character. 

 Indeed, even the whole distinction between baccate, drupaceous, and 

 capsular fruits in the polyspermous Ruhiacece. is in many cases so 

 indecisive, that in their classification it may answer better to proceed 

 still farther m the direction already indicated by Mr. Bentham, and 

 to take the primary characters from asstivation, placentation, and 

 stipulation, rather than from the texture of the fruit and the surface 

 of the seeds. 



The following conspectus of the species of Kadua exhibits the diver- 

 sities which this genus presents : — 



KADUA, Cham. 4- Schlecht. 

 § 1, Flores in cymam terminalem thyrsumve congesti: folia coriacea. 



* Semina alata ! Plantas centranthoidese, thyrsiflora^, subglaucaj, basi 



tantum frutescentes ; foliis subsessilibus rigidis lineato-costatis ; 

 lobis calycis breviusculis ; corolla3 lobis asstivatione hand inflexis : 

 capsula apice baud producto fere plana. 



1. K. CENTRANTHOiDES, HooJc. S^ Am. Glaberrima : folia ovato- 

 lanceolata seu cordata-ovata : stylus etiam glaber ! 



2. K. GLOMERATA, HooJc. 8; Am. Inflorescentia floresque pubes- 

 centes : folia caulina oblongo-lanceolata. 



* * Semina complanata, scobiformia, nunc marginata vel subalata. 



3. K. CORDATA, Cham. S)- Schlecht. Weigmannia glauca, Meyen. 

 Habitus inter prsecedentes et sequentes : folia superiora et floralia sub- 

 cordata, ea cymulas glomeratas involucrantia : lobi calycis ovato-lan- 

 ceolati ovario bis longiori, capsulam fere hemisphtericam vertice plani 

 usculam excedentes. 



* * * Semina immarginata, compresso-angulata : corollse lobi in ala- 



. bastro apice inflexi. 

 H— Caules suffrutescentes, 1 — 2-pedales ; calyces majusculi. Kohautice 



aflfines. 



4. K. CoOKiANA, Cham. 8f Schlecht. Gracilis, juncoidea, pauciflora ; 

 foliis anguste lanceolatis linearibusve rigidis nervuloso-reticulatis ; calycis 

 lobis subulato-lanceolatis ovarium longe superantibus ; capsuliB vertice 

 libero conico. 



5. K. PARVULA, Gray, I. c. Glaberrima ; ramis gracilibus usque 

 ad apicem foliosis ; foliis coriaceis utrinque lucidulis conformibus (un- 



