26 ANNALS OF SCOTTISH NATURAL HISTORY 



A. arvensis, L., is met with occasionally as a weed in fields near 

 Aberdeen, but only as a rare casual. I have never observed it 

 to reappear in fields in the same place in subsequent years ; but 

 on the ground in question it has held its own, or even become 

 rather more abundant. 



Chrysanthemum segetum, L., is not common in the immediate 

 vicinity of Aberdeen, though plentiful a few miles inland. It 

 was locally common near the mills, and a few plants grew 

 scattered about the ground. 



C. Parthenium, Pers., is a not uncommon casual or garden-escape 

 near Aberdeen. It was locally abundant on this ground, the 

 patches extending from year to year. It may have grown 

 from impurities of cereals or from sweepings of shops. 



C. coronarium, L. Of this native of Southern Europe a single plant 

 was found in 1893, no doubt grown from the rubbish of some 

 seedsman's shop. 



Matricaria Chamomilla, L., a common European weed, and known 

 as a weed of cultivated ground in England, was fairly common 

 in 1893, but diminished year by year in frequency; while 

 Tanacetum vulgarc, L., and Artemisia Absinthium, L., failed to 

 reappear after 1893. 



Artemisia arenaria, DC. A single example, introduced probably 

 in wheat from South Russia, was found in 1892. It had not 

 been observed before in the district. 



Calendula officinalis, L. This common garden flower was not rare 

 in 1893, doubtless introduced in refuse from shops; but it 

 became less and less frequent, and was not seen in 1896. 



Senecio viscosus, L., said in the " Student's Flora " to occur on dry 

 ground from Banff southwards, is only a rare casual near Aber- 

 deen, not reappearing in the same spot, so far as I have observed. 



Arctium minus, Bernh., a local plant in this district, with a distribu- 

 tion suggestive of man's unconscious agency, was rare in 1893, 

 but had in 1896 become almost a conspicuous feature in the 

 vegetation. 



Helianthus tuber osus, L., the Jerusalem Artichoke, has appeared 

 sparingly year by year, probably from the outcast produce of 

 some garden. 



Centaurea Cyarnts, L., a sporadic cornfield weed in Aberdeenshire, 

 and C. Calcitrapa, L., a native of Southern England and of 

 Middle and Southern Continental Europe, both appeared here 

 and there, the latter plant only in 1893 and 1894. Both were 

 probably introduced in refuse from cereals. 



