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Matthews .— TJie Distribution of certain 
( 1914 ). The group exhibits a sudden diminution in numbers in the interior 
of England, and a marked coastal tendency east and west. 
Diagram 6. The Peninsula species, numbering 41, have a European 
Diagram 6. Distribution of41 ‘Peninsula’ species. 
distribution which is essentially south-western, 22 of them belonging to 
Stapfs southern element, while 7 are definitely Atlantic. Nearly all occur 
in France and Spain, and more than half are absent from Central Europe. 
Their concentration in Cornwall may be attributed, then, to an almost direct 
northern extension from their chief European centre. Within England they 
thin out in the opposite direction to the Ouse group of plants, as a glance at 
