78 The Irish Naturalist. 



Shannon. The water of this lake is exceptionally clear and 

 brilliant, and of a pale emerald-green colour in the shallows ; 

 but, being supplied almost altogether from springs, it is ex- 

 ceedingly hard, and the plants growing in it are consequently 

 much encrusted. With these few preliminary remarks I now 

 proceed to mention some of the most interesting plants found 

 in and near these lakes, and in other selected localities. On 

 the shores of I,. Knnel, Stellaria glauca, Cicuta virosa, Carex 

 paradoxa, and Carex CEderi were observed ; and it was in this 

 lake that Chara tomentosa was first discovered ; it is, however, 

 here somewhat dwarfed, and, as far as I have seen, does not 

 appear to grow to an} T thing like the same size as in the other 

 lakes. In L,. Derevaragh I was fortunate enough to find 

 Ceratophyllum demersum, rather a scarce plant in Ireland, but 

 abounding in that part of this lake known as the " Pond of 

 Donore." Here also, plentifully distributed, grows the beauti- 

 ful Chara tomentosa, with its pink, coral-like, branched heads, 

 and in this part of the lake, as well as in the boat harbour of 

 Kiltoom, Tolypclla glomerata was found in abundance. Near 

 the Coolure shore, at the mouth of the Yellow River, 

 Callitriche hamulata and C. obtusangula were observed by 

 Messrs. J. and H. Groves. I,. Owel produces some un- 

 common plants, Potamogeton proelongus, P. Zizii, P. lucens, and 

 P. heterophyllus, as well as a species, growing near Mount 

 Murray, not fruiting or coming to the surface, which the 

 Messrs. Groves were unable to determine ; it resembles P. 

 nitens in foliage and general character. In this lake are also 

 Ra?iu?iculus pseudo-fiuitans, R. trichophyllus, Myriophylhim 

 verticillatum, M. spicatum, and Chara tomentosa, the latter 

 growing in a bay, or rather an inner lake at Tullaghan, even 

 finer and larger than in Lough Derevaragh. A variety of C. 

 tome?itosa was also discovered in a drain connected with the 

 lake by the Messrs. Groves, who have not yet, I believe, given 

 it a name. At the N.W. end, in the marshy, and at times sub- 

 merged land near the village of Bunbrusna, Lathyrus palustris 

 grows luxuriantly and plentifully along with Scutellaria 

 galericulala, Rumex Hydro lap athum, and Cnicus Forsteri, and 

 at the S.E. end of the lake, near the canal supply at Levington, 

 /uncus obtusiflorus occurs. But nowhere in the county have 

 so many rare plants been observed as in the 'Scraw bog' of 

 Loughanstown and Ballynegall, situate about half a mile to 



