MONOGRAPH OF THE BRITISH SPECIES OF EUPHRASIA. 



329 



Scheme II. 



Pa l(CO-Ba rtschia. 



Bccrtschvco 



Bdlardutkc 



Ancestors of Ancestors of 



E. alpina, hirtella, E. cuneata, ? 

 grandijlora, &c. iiisignis, &c 



Euphrasia, Sect. Trifida. 



Subsection I. includes all the European species ; it is divided 

 into three groups, viz. Group I. Parvijiora ; Group II. Grandifiorce ; 

 Group III. AnfjustifoUa, ; and as all these are represented by our 

 indigenous species, I propose to take into consideration each group 

 in order. 



Section I., Eueuphrasia; Subsect. I., Semicalcarat^ ; 

 Group I., Parviflor-e. 

 This group includes thirty-three species, of which nine are 

 British. These thirty-three species are spread over Northern 

 Europe, Asia, and America. The adjoining Plan shows the distri- 

 bution and connection of the most important of these species at a 

 glance. 



Plan showing Areas of Distribution. 



