1904. Coi^GAN. — Additions to the Flora of County Dublifi, 59 



far naturalised near the head of Kelly's Glen as to deserve admission 

 to the county flora. In this station, not the Kelly's Glen of the old 

 botanists (Glenasmole), but the more eastern glen, now known by 

 that name, and lying between Tibradden and Kilmashogue 

 mountains, I have known this willow for fully a quarter of a century. 

 Originally planted here near the old spa well, it is now spread for a 

 couple of hundred yards along the river, not only in full grown trees 

 but forming young thickets in swampy ground, where it grows in 

 association with Alder and Salix atirita, and looks quite wild. 



Sparganium negi^ECTUM, Beeby. — Abundant by a marshy overflow of 

 the Broadmeadow Water near Fieldstown, and frequent by the 

 Royal Canal above Lucan station, 1903. Probably widespread in 

 the county and throughout Ireland. This plant is very distinct in 

 its fruit characters from typical S. raviosjtTti, and appears to be fully 

 worthy to rank at least as a sub-species. 



Potamogcton plantag^lneus, Ducroz.— Occasional in the Royal 

 Canal from Lucan to Clonsilla, 1901. There is reason to fear some 

 error in the previous record for this plant in Cybele, 1866 : — " Common 

 in ditches in the bogs amongst the Dublin mountains." Year after 

 year it has been searched for in the mountains without success, and 

 it seems probable that the Co. Dublin record may have been founded 

 on some accidental mixing of herbarium specimens. If the above 

 Royal Canal record be taken as the only certain one, then the species 

 must be regarded as an alien for Co. Dublin, introduced by the Canal 

 from the midland counties with other aquatic aliens, and long since 

 become established. 



Sclrpus f luitans, L.— In pools at the Bog of the Ring, 1903.— A rare 

 species in the county, so far, known to me in only two stations, 

 Howth Head and that just recorded. It appears to be absent from 

 the mountains, although its marked calcifuge character would lead 

 one to expect its occurrence there in bog pools or bog drains. 



Carex axillaris, Good.— By the edge of a wet ditch at Castle Bagot, 

 Milltown, 1903.— Not so well marked here as at Malahide, but like 

 most hybrids this is very inconstant in its characters. 



C. pallcscens, L. — In the course of a tramp over Seecawn mountain 

 and down the Dodder valley in July last with my friend, Mr. W. H. 

 Bloomer, we had the pleasure of gathering this sedge for the first 

 time in Co. Dublin. It grew in moist grassy places by the upper 

 reservoir near Ballymorefinn, Glenasmole. In Mackay's Catalogue, 

 1825, this species is recorded for Kelly's Glen, the name then current 

 for Glenasmole, and eight years later, in the Irish Flora, it is recorded 

 for moist meadows at Howth. Wade, too, in 1804 {Planta Rariores) 

 recorded it for Curragha Bog, a locality doubtfully in Dublin, and 

 now drained. These are the only records previous to the present 

 one, which gives welcome confirmation of a record more than three 

 quarters of a century old. At Howth, the plant appears to be 

 extinct. 



