AO PRINCIPLES OF BOTANY, ET€. 
ir § 866. 
It follows. at the same time, that various com- 
mixtures of these Floras, after the continent was 
dormed and variously cohering, must have taken 
place. Hence is southern France where the Hel- 
vetic and Pyrenean Vloras combine, so rich in plants. 
Hence in Piedmont the Floras'of the Pyrenees, of 
Helvetia and. the Apennines mix amongst each 
other, whither likewise the sea has carried many 
plants of. Northern Africa. Hence Great Britain 
has ‘partly 'the Northern, partly the Helvetic Flora, 
and in the southern extremity of that kingdom, in 
Cornwall, some plants of the Pyrenean Flora, on 
account of. the neighbourhood of Spain, appear 
among the rest. Sweden, Denmark, and Russia 
have not retained the Northern’ Flora unmixed ; 
they have ‘got many plants of the Helvetic Flora. 
The same is the case with Germany, especially 1h 
our Brandenburgh, which ‘has, besides the Helvetic 
Flora, got.part of the Northern. From the last we 
certainly received, Malaxis Loeselii; Satyrrum 7e- 
pens; Uelonias borealis; Vaccinium Oxycoccos; Le- 
dum palustre; Andromeda polifolia; Linnaea bo- 
‘realis. Of the Helvetic Flora we have, Chironia 
Centaurium; Wuphorbia Cyparissias; Cucubalus O7- 
tes, and the greatest number of our plants. | 
It is a remarkable circumstance that such coms 
mon plants as Euphorbia Cyparissias, and Cucubalts 
Oxites cease to grow about 100 miles from Berlin 
towards the north, and that not one specimen of 
them can be found, though they grow very avell in 
the 
