The Scottish Naturalist. 



81 



R. obtusifolius. 



Common in fields and waste places. 

 R. crispus. 



The commonest species in the district. 

 R. Acetosa and R. Acetosella. 



Both abundant. 

 Euphorbia Helioscopia. 



Plentiful in corn fields. 

 E. Peplus. 



Frequent near houses. 

 Mercurialis perennis. 



Rare ; Langwell and Berriedale. 

 Ulmus montana. 



Reay ; Lybster and Scouthal. Doubtfully indigenous. 

 Urtica dioica. 



Abundant; Castleton, F.J. Hanbury. 



U. urens. 



Abundant. 

 Myrica gale. 



Common on moors. 

 Betula alba. 



Beside streams and on rocky ledges ; Scouthal ; Dunbeath ; 

 Acharole Burn. 



Alnus glutinosa. 



Copses, planted? Abundant at Berriedale, native, F.J. Hanbury. 

 Scouthal. 



Corylus Avellana. 



Frequent ; Wick and Thurso Rivers ; Forss Water ; Reisgill 

 Burn ; Dunbeath, and Berriedale. 



Salix cinerea. 



Riversides ; Watten ! Berriedale ; Dunbeath ; Knockfin 

 Heights ! Reay, F. J. Hanbury 1 

 Var. oleifolia ; near Watten, F. J. Hanbury ; Lybster ; 

 Scouthal ; Dunbeath. 



S. caprea. 



Dunbeath Strath ; reaches a height of twenty feet. 

 S. aurita. 



Common on banks ; Yarrows Hills ; Knockfin Heights ! 

 Var. minor ; on moors and heathy banks. 



F 



