1907. Druck. — Botanical Expedition in Ireland. 151 



obtained by the man's father-in-law, who had a mill about a mile 

 or so up the small stream. The corn was duly ground into meal, 

 but the next year the Polygonum began to appear, and spread 

 rapidhy, so that in time it was called by the children " Dada's Weed." 

 I may say that it is not easy to see any trace of the mill, which has 

 been long ago demolished. Doubtless the prickly stems led to its 

 being conveyed by animals into the neighbouring bog, while the 

 stream itself carried the plant, or the seed of it, downwards to its 

 outfall into the sea. Had the course been longer, a greater extent 

 of the country would have been occupied by this invader. But the 

 introduction of this species throws a sidelight on the occurrence of 

 Sisyrinchium calijornicum at Rosslare, of which more anon. 

 P. cuspfdatum, S. & Z.— Between Sligo and Glencar, not near 



houses, but of course an alien. 

 Euphorbia Helioscopia, L.— Very large plants at Berehaven. 

 Urtica dioica, L. — To 1,300 feet in Kerry. 



Qucrcus foemina, Mill (sessili flora). — Berehaven; Derrynane. 

 Sallx trlandra, L. — In several localities between Killinick and Wex- 

 ford. 

 S. alba, L., var. vitellina. — Near Killinick. 



S. Sinithiana, Sm,— Rossmore ; several localities near Sligo; Kil- 

 linick, Co. Wexford. 

 S. purpurea, L,.— Near Woodford; between Sligo and Ben Bulben. 

 Hydrocharis IVIorsus-ranae. L. — Near Rossmore, Co. Galway. 

 Spiranthes spiralis, C. Koch (autumnalis). — The flowers have a 

 delicious odour resembling white lilac. Near Raven Point, Co. 

 Wexford. 

 Helleborine palustris, Schrank {Epipactis). — Most abundant in the 

 hollows of the sand-hills near Raven Point, Co. Wexford. Liparis 

 should be found here, since it grows in similar places in Wales; we 

 were much too late to be successful in our search for it. 

 Habenaria conopsea, Benth.— Derrynane. 



Sisyrinchium californicum, Dryand. — In the locality where the 

 Rev. E.S. Marshall discovered it at Rosslare, in the greatest abun- 

 dance over manv acres. 

 It must be remembered that a few miles south of the station for this 

 Western American species is Carnsore Point, on which, as my driver 

 said, there had been more wrecks than almost any point in Ireland. It 

 is easy, therefore, to imagine a wreck of Indian corn, as in the case of 

 the Polygonum sagittalum, drifting on the coast at or near Rosslare, and in 

 this manner bringing the seeds of the Californian species. The plant 

 seeds very freely, and one could not walk about amongst it without 

 scattering the seeds. Moreover, I examined several pads of earth which 

 had been scattered from the feet of horses, and in each case saw seeds 

 adhering, so that the animals grazing in the meadows would assist to 

 distribute it when once established. Moreover, the locality is subject to 

 floods, and these would also assist in its dispersal. The fact remains that 



