171 PITTONIA. 



does uofc at all warrant the suppression of them ; and they 

 are all sure to come to the front sooner or later. 



Ill most instances I have declined to carry into fields of 

 foreign botany the work of readjusting specific names ; but 

 several of the genera are exclusively American. 



JACKSO^'IV. 



Rafinesque, Med. Eepos. N. Y. v. 352 (1808), not R. Br. in 

 Ait. Hort. Kew. iii. 12 (1811). Folanisia, Raf. Journ. de 

 Phys. 98 (1819). 



This genus, the most natural of all those which haye bf^en 

 taken out of the Linna^an Cleome, has never had its best 

 character pointed out. Its capsule is only partially dehis- 

 cent, at least in the earliest stage of maturity, and the valves 

 separate from above, the free part becoming recurved to admit 

 of the escape of the seeds. In true Cleome they are wholly 

 deciduous when ripe, but begin their separation from the 

 axis at the base, as in the Crucifene. Whether this character 

 holds in respect to the East Indian species of Jacksonia or 

 not, I can not say. Not having seen any of them, and con- 

 sidering that eminent authors have made of them a subgenus, 

 I leave them untouched. There can be no doubt that the 

 American plants were what Rafinesque regarded as the type 

 o£ Jacksonia, notwithstanding that he named Cleome dode- 

 candra as that type ; for he supposed that name to have been 

 given by Linnseus to the common American species ; in which 

 supposition he appears to have been in error. I ^^-^^ 

 enumerate only the X. American species. 



1. J. TRiFOLiATA, Raf. Med. Repos. N. T. v. 352 (1808). 

 Polanlsia graveolens, Raf. Jnurn. de Phys. 98 (1819). 

 Polanisia dodecnndrci, ESP., Oat N. Y. 6 (18S8), but not 

 Cleome dodecandra, Linn. 



2. .] . UNIGLANDULOSA, CZeome Mntf/ZarjrZ/f Zosa, Cav. Ic. iv. t. 

 306 (1797). Polanisia uniglanduhsa, DC. Prodr. i. 242 (1824). 



