ON THE FLORA OF NORTH-WESTERN DONEGAL. 77 



A. Fibula, Bull. Sow., t. 45. 



Sydenham Hill. Crystal Palace grounds. 

 Var. Swartzii, Fr. Disk dark. 

 A. CAMPTOPHYLLUS, Berk. 



Margate, Berk. Outl. 



{To he continued.) 



ON THE FLOEA OF NORTH-WESTEEN DONEGAL. 



By Henry Chichester Hart, B.A. 



(Late Naturalist on board H.M.S. ' Discovery.') 



So little is known botanically of the wilds of Donegal that I 

 venture to offer a list of the flowering plants and ferns to be met 

 with in the north-western part of that county. 



This is the most inaccessible and the least visited portion of the 

 county, and has, I believe, never been thoroughly examined by 

 any competent botanist. The district over which my investigations 

 extended is bounded on the north and west by the Atlantic Ocean, 

 on the south by a line drawn roughly from Dunglow on the 

 Atlantic or western side to Eamelton on the Lough Swilly or 

 eastern side, while the eastern boundary may be taken as Lough 

 Swilly itself, though my rambles include the opposite or Innishowen 

 coast-line of that magnificent inlet. 



My family being resident m the county, I have enjoyed unusual 

 opportunities for observation ; my head-quarters during the summer 

 have usually been at Carrablagh, in the northern part of Fanet, or 

 at Glenalla on its borders, and thus Fanet has received the most 

 attention. This is the name given to the peninsula lying between 

 Lough Swilly and Mulroy Bay, and bounded on the south by the 

 Knock Alia Mountains. 



The surface of the country is, for the most part, moor and 

 mountain sprinkled over with a number of lochs and tarns ; the 

 geological formation is almost entirely granite or quartzose, with 

 basalt and trap-dykes. Limestone is scarce, and nowhere crops out 

 to any extent ; this naturally modifies and reduces the flora con- 

 siderably. The characteristic features will, however, become more 

 apparent from the following analysis. 



Classing the plants under Mr. H. C. Watson's " Types," we 

 obtain the following results : out of fom' hundred and twenty 

 species the Highland Type will be found to include seventeen 

 species, viz. : — 



Thalictrum alpinum. Salix herbacea. 



Subularia aquatica. Jimiperus nana. 



Silene acaulis. Car ex rigida. 



Sedum Rhodiola. (Polystichum Lonchitis). 



Saxifraga stellaris. Asplenium viride. 



,, opiDOsitifolia. Lycopodium alpinum. 



Arctostaphylos Uva-ursi. ,, selaginoides. 



Vaccinium Vitis-idaea. Isoetes lacustris. 



Oxyria reniformis. 



