the Soils on which they groiv . 161 
Thlaspi arvense , though found in but one locality, was also on sand 
only. 
Geranium dissectum 
Gnaphalium uliginosum 
Lamium purpureum are characteristic of light and sandy 
Matricaria Chamomilla loams. 
Papaver sp. 
Rumex obtusifolius 
Alchemilla arvensis 
Brassica alba 
Chenopodium album 
Fumaria officinalis 
Geranium molle 
„ pusillum 
Lamium amplexicaule 
Lychnis vespertina 
Matricaria inodora 
Polygonum aviculare 
,, Convolvulus 
Triticum repens 
Veronica hederaefolia 
Viola tricolor 
are all chiefly associated with 
these light soils, though 
\ occurring on other types 
as well. 
Besides the weeds detailed in the foregoing lists, there are several 
which are quite universal in distribution, occurring on all types of soil, and 
which may be dominant on any soil. Such plants are the following — those 
which are of universal occurrence, with the exception of chalk, being given 
separately : — 
Weeds of universal occurrence. 
Anthemis sp. 
Capsella Bursa-pastoris 
Cerastium vulgatum 
Convolvulus arvensis 
Equisetum arvense 
Galium Aparine 
Myosotis arvensis 
Phleum pratense 
Plantago lanceolata 
Scandix Pecten — not on sand. 
Ranunculus acris 
Rumex crispus 
Senecio vulgaris 
Sonchus arvensis 
Stellaria media 
Taraxacum Dens-leonis 
Thistles 
Tussilago Farfara 
Veronica agrestis 
M 
