1 84 ANNALS OF SCOTTISH NATURAL HISTORY 



POLYGONUM PERSICARIA, Z., is mostly a colonist. Though very 

 common, it is nearly confined to cultivated fields and waste 

 places, though also found occasionally on roadsides and on the 

 shores of fresh- and salt-water lochs which cattle frequent. 



URTICA DIOICA, Z., is common in waste places, near ruins, and in 

 neglected ground at the sides of fields, roadsides, deserted 

 crofts, and cattle- and sheep-shelters on hill and low ground. 

 It never occurs except near artificial works or natural shelters 

 of rock or boulders. 



POA NEMORALIS, Z., is rare, on roadsides and walls. It is only 

 slightly established as yet, but is increasing. Mountain forms 

 do not occur in this district, but are found in Eigg and Skye. 



BROMUS MOLLIS, Z., is not common, by sides of cultivated fields 

 and roadsides, and occasionally on sandy shores near cultivated 

 ground, where it becomes dwarfed. 



COLONISTS. 



SISYMBRIUM OFFICINALE, Scop., is rare, being almost limited to 

 gardens and their outskirts, rarely observed on roadsides. 



BRASSICA RAPA, var. CAMPESTRIS, Koch, is not common in cultivated 

 fields. 



BRASSICA SINAPISTRUM, Boiss., is comparatively uncommon in 

 cultivated fields, rarely spreading to roadsides. 



BRASSICA ALBA, Boiss., is rather perhaps a casual, being rare along 

 the sides of cultivated fields. 



BURSA PASTORIS, Weber, is a common weed in gardens, and on 

 waste-heaps and neighbouring roadsides. 



VIOLA ARVENSIS, Murr., is not common, in gardens and their 

 outskirts mostly, and more rarely in cultivated fields. This is 

 a common weed of cultivation in Eigg. 



SPERGULA ARVENSIS, Z., var. SATIVA (Bcenn^, is very common in 

 gardens, on waste-heaps, in cultivated fields, and on roadsides 

 occasionally. It spreads on the lower moors through cattle 

 dung, and on bare places near peat-stacks. 



VICIA HIRSUTA, Gray, is mostly a rare casual in cultivated fields, and 

 rarely on neighbouring dry banks. 



SHERARDIA ARVENSIS, Z., is not common, in cultivated fields, 

 usually in first year's grass rotation. It is not permanent at 

 any station. 



CHRYSANTHEMUM SEGETUM, Z., is local, but abundant in some 

 cultivated fields. 



