128 DB. nOOKEB AND DR. THOMSON'S PB.ECTTESORES 



289*. R. squamata, Nees ab E. 

 Hab. In India orientali, Wight. 



290. R. fluitans, Linn. 



Hab. In Himalaya centrali et occidentali, Nipal, Wallich; Kumaon, 

 Strachey et Winterbottom; in montibus Nilgiriensibus, Wight, Schmidt. 



Praeeursores ad Ploram Indicara. By J. D. Hooker, Esq., M.D., 

 F.R.S. & L.S., and T. Thomson, M.D., F.R.S. & L.S. 



[Read June 21st, I860.] 



CRUCIPERJL 



In the following sketch of the Indian Cruciferce, the new arrange- 

 ment adopted in the forthcoming ' Genera Plantarum,' by Messrs. 

 Bentham and J. D. Hooker, has been followed. The majority of 

 the species were described and carefully analysed several years ago, 

 with a view to their earlier publication, in accordance with 

 DeCandolle's classification of the Order ; but it was found that 

 they contained so many oriental forms unknown to that great 

 systematist, and which materially affected the value of his divi- 

 sions, that all were laid aside till an opportunity should occur of 

 revising the whole Order. This has since occurred, and has led 

 to the re-examination of every Indian species by Dr. Hooker, who 

 is the author of the arrangement adopted in the Clavis generum 

 now proposed for the Indian species. 



CLAVIS GENERUM. 



Series A. Siliqua inarticulata, per totam longitudinem dehiscens. 

 Yalvae intus continual, turgida3 v. septo parallele compress*. 



Excepta. Siliqua indehiscens in Leptaleo, interdum in Alloceratio, et 

 apicem versus in Brassicis quibusdam. Valvae intus subseptatae in 

 Notoceras, etc. 



Tribus I. Arabidej:. Siliqua angusta, elongata. Semina ssepis- 

 sime 1-seriata, Cotyledones accumbentea (ignotce in Loxoste- 

 mone). 



Excepta, Siliqua interdum brevis in Nasturtio, Parrya et Notocerate. 

 Semina 2-seriata in subgenere Turritis {Arabidis) et Parryis variis. — 

 Vide Farsetia et Draba in Tribu II. 



* Valvae exappendiculatce. Sepala erecta, elongata. Stigmata erecta, 

 connata v. secns sti/him decurrentia. 



