Hart — On the Mountain Flora of Ireland. 
567 
Polystichum angular e : throughout ; exceptional. 
Lastrea thelypteris : marshy ; chiefly southern, but with a. 
few stations in the north. 
Asplenium lanceolatum : south. 
Adiantum capillus-veneris : west and north, on the coast;: 
exceptional. 
Equisetum telmateia: throughout, but less common in the west 
and north. 
It will be seen that the above list is fully in accordance with the 
views already stated. It is necessary to mention here, however, that 
an additional view of the distribution of plants in Great Britain has 
been adopted by Mr. Watson. In this view he takes into account 
only the geographical areas which certain sets of species occupy 
within the kingdom, and omits the consideration of their vertical 
range on the mountains. But it is of course impossible to make two 
satisfactory codes of distribution, especially as the one already de- 
scribed is partly dependent on latitude and therefore coincides largely 
with his more purely geographical division. This latter gives also 
six types, and is, in nomenclature at anyrate, somewhat more con- 
venient. We have (1) British, or spread throughout; (2) English, 
chiefly in south or south -middle Britain ; (3) Scottish, north or north- 
middle Britain ; (4) Highland, chiefly about the mountains ; (5) Ger- 
manic, chiefly in East England ; (6) Atlantic, chiefly in "West 
England. 
These types do not suit the distribution of Irish plants. In the 
first place Ger manic is almost totally unrepresented. Atlantic is in 
Ireland a misnomer, as most of them occur round the coast, [and the 
group reaches a maximum in Ireland on the south-east side, not on 
the west. Again British is unsatisfactory because it includes species 
so differing in range as Potentilla tormentilla^ which grows everywhere 
even to the top of the highest mountains, as well in Scotland as in 
Ireland, and Fumaria capreolata, which never leaves the lowlands. 
And the continental distribution of such species renders this dis- 
crepancy still more glaring. Keeping in view as much as possible 
the methods adopted by Mr. Watson, the Irish flora might be sub- 
divided as follows : — 
I. Ubiquitous. In all parts of Ireland, and reaching tops of 
highest mountains or nearly so. 
