58 The Irish Nattiralht. March 



according to W. L. Jepson (/%;-. West. Mid California, 1901, p 515), 

 its habitat is the " rich soil of fields," while the commoner 

 M. discoidea, as with us, usually inhabits beaten tracks. A very- 

 distinct dwarf variety of /!/. discoidea, the var. pygmcca of Semler, 

 whicli is found in sandy ground in Bavaria, has not so far been 

 recorded for Ireland, though it may be expected to occur. Nurnberg 

 specimens of this variety in my herbarium are uniformly one- 

 flowered, with unbranched stems ranging from an inch to an inch 

 and a half in height. 



Llthospcrmum arvense, L. — A single plant near King James's 

 Castle, Finglas, 1903 (Miss M. C. Knowles). Sparingly by the roadside 

 near Carrickmines, 1903 (Arthur D. O'Murchoe). It is hard to 

 decide whether this species be more than a casual in Co. Dublin. 

 Though there are fairly numerous records for it reaching back for a 

 century, in almost all cases it appears to occur in very small 

 quantit}'. 



*LiNARiA PURPUREA, Miller, — In profusion and thoroughly established 

 for fully 100 yards along the bank of a deep railway cutting, near 

 Island Bridge, 1903. It has undoubtedly originated here as a garden 

 escape or outcast. 



Chenopodium murale, L. — In two places near Corballis, Portrane, 

 1903 (Dr. Scully & N. C). Though very rare in Dublin and ap- 

 parently becoming rarer, the appearance of this species in various 

 stations from time to time within the last ico years entitles it to a 

 place in the county flora. 



*HiPPOPHAE RHAMNOIDES, L. — Now fully naturalised on the Rush sand- 

 hills, where it freely reproduces itself from seed. The following 

 notes show its standing here in 1902 : — A large thicket on sandy 

 bluff's above the beach at Rogerstown coast-guard station, with 

 small scattered plants, apparently self sown, in the vicinity ; some 

 hundreds of seedling plants spreading for forty-five paces along 

 a sandy fallow near Rogerstown harbour, the seedlings obviously 

 derived from a row of full grown bushes capping an adjacent 

 sand-dike ; also a large clump on a knoll and in adjacent sandy 

 hollows about 200 yards inland from the coast-guard station, with 

 numerous seedlings appearing in the neighbourhood of the mature 

 plants. In the same year I measured the bared roots of some mature 

 plants growing at the edge of the sand bluffs which had been much 

 undermined by storms and high seas. Though the bushes were 

 no more than three feet high, some of their roots were fully 

 sixteen feet long. 



Sallx Caprca, L.— This, the rarest of the native Co. Dublin willows, 

 is quite frequent in the dense hazel copses of Lower Glenasmole, a 

 short distance above Bohernabreena bridge, where I counted some 

 dozens of well grown trees last year. 



•S. PENTANDRA, L. — Although this handsome willow has no claim to be 

 considered native anywhere in Co. Dublin, it appears to be now so 



