FLORULA OF A PIECE OF WASTE GROUND AT ABERDEEN 31 



more delicate plants had disappeared. Some of the grasses 

 {Phleuni pratense, Agrostis palustris, Dactylis glomerata, and 

 Agropyron repens] covered large patches, often to the exclusion 

 of almost every other plant. Over most of the area thistles 

 (C. lanceolatus, and more locally C. arvensis] abounded, often 

 in dense beds. Here and there grew conspicuous clumps of 

 hemlock, burdock, goosefoot, docks of various species, and 

 the larger nettle, and large masses of Tussilago covered the 

 ground. Sisymbrium pannonicum, Medicago sativa, M.falcata, 

 and Melilotus officinalis continued to increase in numbers. 

 Here and there certain other species showed an increase, but 

 for these reference must be made to the list. As previously 

 noticed, the cinders showed in general a very poor vegetation, 

 with, here and there, greener patches of deep-rooted species, 

 or of others that require little soil. Some heaps of refuse 

 soil and of manure lying on the cinders were covered with 

 close vegetation, one being almost covered with Polygoinun 

 Convolvulus and some examples of Saponaria Vaccaria. 

 During the autumn of 1896 a considerable additional tract 

 has been covered with cinders, which will still further modify 

 the vegetation noted during the past four summers. The 

 products of the cinder beds will probably afford an interest- 

 ing study of the types of vegetation that can find a suitable 

 home on them in future years, if all vegetation is not excluded 

 by railway extensions. 



NOTE. Viria tetrasperma, Moench. In the October issue, p. 245, 1 

 stated that this " had not been observed in this district before." 

 Since the publication of this statement I have been informed 

 by Mr. A. Somerville that, during a visit to Aberdeen in 

 1 88 1, he found this species "growing in the outskirts of the 

 city," and forwarded the specimen alive to Sir J. D. Hooker, 

 at Kew. 



Potentilla recta, L. I have recently been shown a specimen of this 

 species found within the inclosure of the Railway Station at 

 Dyce, a few miles north of Aberdeen. It may have been 

 introduced from the same source as those found by me at 

 Aberdeen (p. 245). 



