762 PRESIDENT S ADDRESS. 



Examples of this classification are given as follows : — 



Region. — (1) " Region forestiere de I'Europe occidental." 

 (2) "Region mediterraneenne." 



Domaine. — Region (1) " XJn domaine atlantique, un domaine 

 des plaines du Nord continental Europeen, un domaine du centre 

 de I'Europe." 



Region (2) " Domaines iberique, Mauritanien, frangais, etc." 



Secteur. — The " Domain atlantique " includes " Un secteur 

 aquitanien, ou les especes iramigrees de la region Mediterraneenne 

 sont nombreuses, et un secteur armoricain ou elles manquent." 



District. — "Dans le domaine fran^ais de la region mediter- 

 raneenne, le district calcaire des basses Corbieres, les districts des 

 maures et de I'Esterel forme de roches eruptives siliceuses. Les 

 Baleares, avec leurs nombreuses especes endemiques, constituent 

 un district tres distinct dans le secteur occidental du domaine 

 iberique." 



From this it is clearly seen that the grouping of land-areas 

 even in Europe contains the elements of indefiniteness and of 

 expediency; as our country becomes better known botanically we 

 shall be able to define it better, but New South Wales will 

 certainly be found to be. more uniform in its vegetation (and 

 therefore more difficult to split up into divisions), than western 

 and central Europe. We have much of the continental climate 

 and uniformity of Russia. 



It will also be seen that the divisions "Domaine," "Secteur" 

 and " District " are, in the present state of our knowledge, only 

 of partial application to New South Wales, unless we attempt 

 much subdivision. I feel more and more strongly that we have 

 so much pioneering work to do in connection with our botanical 

 survey that we cannot at present adhere very closely to European 

 precedents in regard to the subdivision of botanical areas. C. 

 B. Clarke^ has divided British India into botanical areas. He 

 says, " British India having been treated as a Subarea of the 



"On the Subsubareas of British India, illustrated by the detailed distribu- 

 tion of the Cyperacese in that Empire. Journ. Linn. Soc. Bot. xxxiv. 1. 



