244 ANNALS OF SCOTTISH NATURAL HISTORY 



Arrhenatherum avenaceum, Beauv., forms a part of the coarser 

 vegetation as in former years, but does not seem to be 

 increasing. 



Dactylis glomerata, Z. The same remarks apply to this as to 

 Phleum pratense. 



Poa annua, Z., is diminishing as the open ground becomes lessened. 



P. pratensis, Z., appeared slightly more common this year in July, 

 perhaps because of the time of year. 



P. trivialis, Z., did not seem quite so abundant as formerly. 



P. nemoralis, Z. Two or three plants were observed in flower in 

 July, and the hardly recognisable stems were again seen in 

 September. 



*Festuca rigida, Kunth. The name of this species was inad- 

 vertently omitted from my former list. It grew in 1893 and 

 1894 on the more open spots and paths, but the coarse 

 vegetation has crushed it out. 



F. elatior, Z., and var. pratensis, Huds. As in 1896, not increasing. 



Bromus mollis, Z., and Lolium perenne, Z., show no tendency to 

 increase, nor can they hold their place against the larger 

 grasses. Of L. perenne, var. italicum, Braun, only one or two 

 plants were seen. 



Agropyron repens, Beanr., continues to increase, forming almost the 

 whole of the vegetation in places. Var. barbatum, Duval- 

 Jonve, is a good deal more abundant than var. obtusum, Syme. 



Triticum vnlgare, Vill., Seeale cereale, L., Hordeum distichum, L., 

 and H. hexastichum, L. Of all four a few plants were seen on 

 rubbish, especially near the mills. 



A comparison of the above list with my previous paper 

 on the same flora shows very clearly the inability of all but 

 a very few of the introduced plants to hold their place where 

 left to contend with the native species. It shows too how 

 a few vigorous and rank -growing species crush out many 

 other less vigorous forms and impoverish the flora. 



The following species that were included in the list for 

 1896 have not been observed in 1897. Several evident 

 casuals among them, of which only one or two specimens 

 were found, are denoted by an asterisk : *Papaver dubium, 

 Sisymbrium officinale, Brassica Rapa, *Thlaspi arvense, 

 *Saponaria Vaccaria, Silene Cucubalus, *Lychnis dioica, Vitis 



