16 THE BOTANY OF THE BARROW. 



Slate, and Figile rivers. In it I noticed Foa aquatica, Ranunculus 

 Lingua, Potaningcton Iieterophyllus, P. lucens and P. rufescens (?), 

 Sai/ittaria sagittifolia and Carex resicaria. The Black Eiver is here 

 the boundary between District V. and VII. In fields near I noted 

 CardmiH jjycnocephalus, not often seen so far from the coast. By 

 the Grand Canal, which here complicates the geography still 

 further, I gathered Potamor/eton densus, Q^nanthe PhelUmdrium var. 

 tinciatilis (a frequent and undistinguishable form), and Carex 

 vmricatd. By the Barrow, below Monasterevan, at Moore Abbey, 

 ThaUctrum majus, Poa aquatica, and on the bridge Gystopteris 

 //•rt//«7/s were observed. Carex vesicaria, C. acuta, Lysimachiainilgaris, 

 Sparganiuin simplex, CEnanthe PlieUandrium, and Mgriophglhun verti- 

 cillatum are frequent. After about two miles I gathered Nasturtitmi 

 sglvestre, which was common in low wet meadows on the right 

 bank. A single locality on the Suir and another on the Blackwater 

 were its only known habitats in Ireland. It is plentiful along this 

 part of the Barrow. N. pa lust re was also observed. Klodea 

 canadensis occurs occasionally. "White water-lily first appears 

 about here, appearing to like deeper and more stagnant water than 

 its yellow relative. Carex stricta occurs also, and Rhamnus cathar- 

 ticus commonly below Kiverstone House. I left the river for the 

 day at Old Fort Bridge (Dunvally on the map). Since the imion 

 of the Black Eiver the Barrow has become a goodly stream, but its 

 course here is through a dull county for a considerable distance. 



On June 24th I kept the left bank from the Old Fort Bridge. 

 There appeared to be two considerable tributaries on the right 

 bank and only one on the left, but this one when I came to it was 

 quite unnegotiable, a deep stagnant trough of mud, weeds and 

 water, which I could neither wade, jump, nor swim. I was 

 doubled back here to Cloney Bridge, and lost much time before I 

 regained the Barrow. Prior to the Cloney I had noticed no new 

 plants. Nasturtium amphibium, as well as the other two mentioned 

 above were there, the N. sglvestre being frequent. Festuca arundi- 

 nacea is also common. At this contumacious tributary I first saw 

 Rumex Hydrolapathum, and in the extended swamp I had to cross to 

 reach Cloney I3ridge I saw it in several places. Frequently I 

 tried this treacherous stream, but had to desist. Carex paniculata 

 and C. stricta were large and plentiful by its edges. The place was 

 horrible, and, judging from the multitude of i-edshauks and wild 

 duck, is seldom disturbed. Having at length got back to the 

 Barrow, the great abundance of Poa aquatica was noticeable. It 

 forms a wide fringe on either side continuously, almost throughout 

 the greater part of its course, and it appears to be highly valuable, 

 for cattle wade out as far as they dare to browse on it. A little 

 before Athy I met with Stellaria glauca again, and on ditch banlvs 

 leading down to the river ClicBrophylluni temulum was gathered in 

 two or three places. At Athy C/tenopodium Bomis-Henricus occurs, 

 and close by, along the towing-path below the town, Verbena 

 officinalis, rare except in the south, and probably brought up by the 

 traffic. 



From this point there is usually a tow-path belonging to the 



