ON THE FLORA OF INNISHOWEN, CO. DONEGAL. 23 
List showing the number of Counties and Vice-counties from 
which specimens have been seen :—- 
CHARA LycHNoTHAMNUS 
fragilis 59 alopecuroides ............ -1 
fragifera 1 Touypenia 
connivens 2 glomerata 12 
aspera ee prolifera 2 
polyacantha © ......5....0..- 7 intricata 6 
baltica 9 NIvrewua 
contraria 11 tenuissima 3 
hispida 83 acilis 3 
vulgaris 53 mucronata 2 
tomentosa 3 ErADSIMCONG . ...425.<0405hs0 Ag 
canescens 2 flexilis 19 
obtusa 1 opaca 50 
ON THE FLORA OF INNISHOWEN, CO. DONEGAL. 
By H. C. Harz, B.A. 
_ Innisnowen, the north-east part of Co. Donegal, is a well-marked 
and naturally defined division of the county. It lies between 
Loughs Foyle and Swilly, running northwards to Malin ‘Head: the 
extreme northern part of Ireland in latitude 55° 23’, while it wv 
bounded by a line drawn irregularly across the narrowest part of 
eighteen square 
ishowen iat from its most southern part along the 
hirty 
on the east to Dunree on the west is twenty-five miles. Its shape 
is roughly that of a boy’s kite, lying evenly north and south. The 
—— structure of Innishowen is of Cambrio-Silurian age, with 
uch quartzose = gneiss, the latter probably of Laurentian age. 
Granite occurs at Dunaff Head chiefly, and trap rocks are repre- 
vom there rd and more ae near Buncrana, while in the 
part some of the mountains, as Bulbein, expose sections of - 
prety shales, and eson tit sto shy There is little limestone, and 
the prevalence of that most Sane of all rocks, Gunesneee is detri- 
to the vegetation, especially in the western mountainous 
segs bounded by Lough Swilly, which would tlie; no 
