ON THE FLORA OF INNISHOWEN, CO. DONEGAL. 17 
Osmunda regalis.—Very rare in Innishowen; becomes at once 
acres anal characteristic upon crossing Loug h Swilly. 
hyllum Wilsoni.—Increases sendy tigger c% ; very 
ke en = Glenvegh, Slieve Snacht West, & 
The above list only includes plants fonnd in Innishowen, but to 
give a full idea of this su ubject I will mention a few characteristic 
or locally frequent Spee of Donegal which do not appear in 
Innishowen ; these 
Trollius europaeus. Polypodium Phegopteris 
Ce entunculus minimus, E. H Ape scat Tunbrigense. 
riocaulon septangulare. 
None of es have yet been found in inatabitiggh Centunculus is 
likely to o 
he ere group of plants illustrates one fact: that the 
climate increases in humidity westwards. Innishowen is drier and 
probably also colder than the area parts of the county. The 
increasing variety and pay of ferns show this, and others in the 
list are plants which a s much dependent upon the damp 
atmosphere for their aver as damp soil for their roots. The 
influence of the Gulf Stream is thus vos ro dy and especially in 
its rendering the winter milder to the w 
The species next enumerated diminish or disappear altogether 
after we cross Lough Swilly. Rare plants are not taken into 
consideration :-— 
t Papaver ae — Much scarcer in Fanet and westwards; a 
rare ssioein 
Nuphar ia E.—Scarcer in the we 
{ Barbarea vulgaris r.—A rare eslogiae] in North Donegal. 
tSisymbrium officinale. — Perhaps a pene ist in Innishowen ; 
almost certainly so in Fanet and farther 
Capsella Bursa-pastoris. — Decreases Misa and probably a 
colonist far wes 
* Senebiera Co oronopus r.—Not met with west of Innishowen; not 
native in Donega 
t Reseda Luteola ; ; Stlene anglica zn. — Not met with west of 
Innishowen ; both are probably introduced weeds. 
+S. inflata E.—Not met with in the extreme north-wes 
Sarothamnus scoparius —Secarce; rarer westwards, 2a not seen 
west of Mulroy. 
Ulex europeus.——-Not native in * extreme north-wes 
aren pratense. — Probab not native in North: west 
Donegal 
rr. wabcld ium, — Very scarce, but occurring to the extreme north- 
west; a characteristic species of Innishowen. 
T.. arvense «.—Not met with west of Innishowen. 
Lotus major.—Very rare westward. 
Vicia hirsuta. — Characteristic in Innishowen; much scarcer in 
Fanet, and not seen west of it. 
V. angustifolia.—Not seen west of Innishowen. 
