54 The Irish Naturalist. 



J uncus diffusus, Hoppe. — Kilakee Mountain at i,6oo feet, Sep- 

 tember, 1894. A plant which has all the appearance of a hybrid, yet may 

 be separated without any great difficulty from both of its reputed parents, 

 J. glaucus and J, cffusns. 



II. RARKR COUNTY DUBLIN PLANTS OBSERVED IN NEW 



STATIONS. 



NyiYiphsea alba, Linn. — Very sparingly in pits at Portmarnock 

 brick-fields, where there is no appearance of its having been intentionally 

 introduced ; July, 1894. In the Brit. Ass. Gtiide, 1878, the species is 

 entered " Royal Canal, &c., rather rare." I have never seen the plant 

 there and can find no other definite county locality on record. 



Fumarla denslflora, DC— Potato field near the brink of the large 

 quarry at Finglas, June, 1894. The only previous county record seems 

 to be Mr. G. C. Druce's for Portmarnock (y. of Bot. 1891, p. 304). 



Alyssum calyclnum, Linn.— A few plants in a sandy field near 

 Rogerstown coast-guard station, May, 1894. This interesting little alien 

 has long held its ground in the county. Mackay records it from Port- 

 marnock in 181 7 and 1837, and Mr. H. C. Hart from the same place in 

 1867- 1872. My slender Rogerstown specimens range only from i to 2 

 inches in height, so that the plant is not hard to overlook, and may be 

 expected to occur in other similar stations. 



Thiaspl arvense, Linn. — (i) Sparingly in cultivation at Boherna- 

 breena, October, 1893, and (2) abundantly in a sandy turnip field near 

 Rush harbour, September, 1894. 



Silene con lea, Linn. — In considerable abundance, more than a 

 hundred plants, on a bank by the sea, to the north of Portrane peninsula, 

 September 24, 1894. The plant is well established here over a distance 

 of more than 100 yards, but seems to be quite absent from the adjoining- 

 sandy fields, whence it may be presumed to have spread. The only 

 previous record for the county is Portmarnock, 1837 (6>^. Hib.^ p. 43). 



Scleranthus annuus, Linn. — Road track by the Rathmines Water- 

 works, Castle Kell}', at the head of Glenasmole, August, 1S94, growing 

 vigorously in " freestone," as the disintegrated granite is locally called. 



Geranium pusillum, Linn. — A single plant in a sandy field to the 

 north of Portrane, September, 1894. The only other county station is 

 Lambay Island, where it was found by Mr, H. C. Hart in 1882 {Fl. 

 Lam bay'). 



Vicia tct rasper ma, Moench. — Sparingly on the railwa)^ bank 

 between Rush and Skerries, Jul}-, 1894. Knockmaroon is the only other 

 recorded station {Cyb. Hib.) 



Arctium Intermedium, Lange. — This sub-species or varietj-, 

 sufficiently distinct in appearance from A. niimis, so common throughout 

 the county, is apparently rare in Dublin. I found a single plant of it by 

 the edge of a cultivated field above the sea at Malahide in September 

 last. There is a specimen at Glasnevin Herbarium labelled, in the 

 handwriting of the late Dr. Moore: " Arctiiiin intcrmcdiuin, near Baldoyle, 

 1840." Though the plant is set down in the Brit. Assoc. Guide, 1878, as 

 frequent in Dublin, I can find no definite records. 



Campanula rapunculoldes, Linn.— Well established, at intervals 

 over a distance of 100 yards on a grassy bank by the roadside S,W. of 

 Rush, where I gathered flowering specimens in July, 1893. A few plants 

 were found by Mr. A. G. More near Bray Harbour, Co. Dublin, in 1872. 

 No doubt introduced in both stations, yet well fitted by its creeping 

 root-stock to effect a permanent settlement. 



