°" FLORA INDICA. 



that the number of known plants is swelled one-third beyond 

 its due extent, by the introduction of bad species founded on 

 habit, and on accidental varieties produced by soil, exposure, 

 etc. This subject admits of classification under two heads, to 



hich can we be expected to devote much 



v 



this Essay. 



1. There are accidental variations due to no apparent 

 causes or to very fluctuating ones, as colour of flowers and 

 leaves, odour, hairiness (to a great degree), development of 

 parts, strength of medicinal or other properties, hardness and 



irious properties of wood, and many others. 2. More per- 

 manent deviations that accompany change of locality, and af- 

 fect more or less all the individuals inhabiting a certain area : 

 these may often be traced to physical causes, and give rise 

 to races and stocks, which are more or less permanent under 

 cultivation and changed conditions, such as habit, hardiness, 

 and duration of life and of foliage (evergreen or deciduous), 

 predilection for certain soils and exposures, and other cha- 

 racters which are more or less obviously induced by opera- 

 tions that have extended through a series of generations. 



Gregarious plants, in all states, whether wild or cultivated, 



tudy 



particular, offer excellent opportunities 



Nor 



are these remar 



rbaceous or shrubby plants only : even in this coun- 



try the variations of the recently introduced Deodar 



pecific 



* 



trom the Ueuar of Lebanon and that of North Africa*. 



As reganb the specific differences Ween the common Cedar and Deodft 

 u£ T^2 m ° P0U * dbcUSsion - W « h-e - fixed opxnion o» 

 on 3 " hT n™ TS mC ° mplet 3tate of ™ Pledge we rimmed 



mgtlt" '"at^ flU** <>f the Deodar deciduo* 

 r a win. ,1 ?JV "" l ******* «atter their ...e-*d» 



warn aumar nwms to* —i ^ . the difference, of ti ter, 



that of th Cedar b so very variable ** ^ *i 



The odouf and qu. , , Cellar t >' ^ 1 " We,M U,n,H ""° * 



wider which u, IZL ,£»££ v z ;r or f ,w , to *■ vu,n ; 



grown. Length ami colour of leal. Mid 





*r» 



- 



