14 



Proceedings of the Royal Irish Academy. 



Fig. 7. — Distribution of "Germanic" plants. 



6. Atlai^tic Type : " Species chiefly seen in "West England." — 

 This group has its headquarters in the south-west of England, and is 

 in this way related to the " Hihemian" and "Lusitanian" groups of 

 Ireland, since among them are the remnants of the old southern flora 

 that flourished on the lost south-western shore-line of the British Isles. 

 "Watson's Atlantic type has other components besides these ancient 

 species, but it is still the smallest of his British plant-groups, number- 

 ing altogether but 62 species. 



As typical examples of "Atlantic" plants, "Watson cites — 



Sinapis monensis. 

 MattMola sinuata. 

 Raplianus maritimus. 

 Sedum anglicum. 

 Cotyledon Umbilicus. 

 Bartsia viscosa. 

 Pinguicula lusitanica. 



Euphorbia portlandica, 

 Scirpus Savii. 

 Siblhorpia europaea. 

 Erica ciliaris. 

 Polycarpon tetrapbyllum. 

 Adianlum Capillus-Veneris. 

 Cynodon Dactylon. 



Of these, four are unknown in Ireland ; three are confined to the 

 south and west ; most of the others have a wide range in this country. 



