340 THE JOURNAL OF BOTANY 
NATIVES AND ALIENS. 
By THE Rey. E. ApRIAN WooprurFrFe-Peracock, F.L.S. 
modern scientific spirit makes us seek for an exact 
1 th 
THE mo 
explanation of all the phenomena we observe in nature. The 
more fi 
recording facts than has been employed up to date of the last 
publication on this subject—Mr. 8. T. Dunn’s Alien Flora (1906)— 
will have to be employed to collect the mass of exact information 
uired. 
there is little enough 
Th 
awn in existing works are founded on a misunderstanding of 
Before we are in a position to say of a given area what are 
natives, semi-aliens, or aliens—or, as I should prefer to call them, 
in order to avoid old associations, areal, local areal, or extra-areal 
er all j 
plant-food than agricultural soils, should exhibit a, change of flora, 
or at least another frequency when the Species remained the same, 
al : 
: lants, too, which are generally found frequenting such 
soils as form garden ground and tilth grow equally well on 
more exacting than polycarps in the conditions they demand. 
They alone practically frequent tilth, for perennials such as Agro- 
ms are r i iti 
home in atest: E ope over most parts of the Continent, and 
as far as d.” A more unfortunate exam le could hardl 
have been selected than Lamium album. I verily Believe that ist 
