±12 
The Irish Naturalist. 
September, 
it might be heterophyllus X nitem, though niteiis has rarely (if ever ?) been 
found with fruit. The lower parts are very like specimens named 
P. intertnedius Tiselius, from Sweden, but the upper part is not! There 
is a plant that is somewhat like yours, only on a very small scale, from 
Canada, lat. sS*', gathered b}-^ Prof. Macoun. You will say— well, what is 
it ? My answer will be P. heterophylhis, Schreb./. con/ertus." 
In the stream which drains the lake P. lucens and P. nitens 
grow, and the latter was also seen in a starved condition in 
the lake. In marshy ground and shallow bays, especially on 
the upper lake, Cladium Marisais and /uncus obtusiflorus are 
abundant, with some Cai'ex H7idso7iii, and C. filiformis. 
Cladium also climbs out of the water, and colonizes the chinks 
of limestone pavements, up to six feet above lake-level. The 
few wet peaty places yield Drosera a7igltca, D. ijitei^media, and 
Scirpus paitciflorus, and peaty pools are full of Potajnogetofi 
pla7itagme2is, Myriophylhwi verticil Iat7i7n^ and Le7ii7ia trisulca. 
Woods. — The .shade or dependent flora of the dense thickets 
on the islands is limited, and has been referred to already. 
At Derrinrush an extensive natural wood occurs. In addition 
to the trees mentioned above, Prunus Padus grows here. The 
shade plants which carpet the ground include Viola Reichen- 
bachia7ia, Geu77i rivale, Crepis paludosa^ Ve7vnica mo7ita7ta, 
Neottia Nidus-avis^ and Epipactis lafi/olia. 
Li77iesto7ie pave77ie7its.— Along the western side of the lake 
there are several areas of bare limestone, forming irregular 
pavements and terraces. These were examined with some 
care, to see what members of the Burren flora extend to this, 
the extreme northern limit of the Galway-Clare area of lime- 
stone pavements. The best find was Neoti7iea iTttacta, of which 
two stations were discovered by my wife and one by myself, 
namely, half mile south of Deradda, half mile west of 
Bonniamillish Island, and half mile north-w^est of Church 
Island. As these stations range from the south to the north 
end of the lake, and as the plant was of course in fruit, and 
therefore difiicult to find, there can be little doubt but that it 
is fairly abundant in this district. Its previous most northern 
station in Ireland was by Lough Corrib, near Cong'(D. Moore, 
1872). On these limestones Rubia pe7xgri7ia and Aquilegia 
vulgaris are abundant, as well as all the plants mentioned as 
characterizing the Sesleria zone around the lake. Taxus 
