150 Brenchley . — The Weeds 
Erodium cicutarium 
Gnaphalium uliginosum 
Holcus lanatus 
Linaria minor 
Rumex obtusifolius 
Sagina nodosa 
Silene gallica 
Urtica dioica 
Alchemilla arvensis 
Juncus bufonius 
Lamium amplexicaule 
Polygonum Persicaria 
Scabiosa arvensis 
Sisymbrium Thalianum 
Veronica agrestis 
Veronica hederaefolia j 
Matricaria Chamomilla — ; 
Arenaria serpyllifolia 
Anthemis arvensis 
Carduus nutans 
Centaurea Scabiosa 
Filago germanica 
Geranium molle 
„ pusillum 
Raphanus Raphanistrum 
Reseda lutea 
Satureia Acinos 
Silene noctiflora / 
Papaver Rhoeas — also on 
of Arable Land . II 7 . 
characteristic of sand and sandy 
loam. 
) also on loam. 
on heavy loam. 
y also on chalk. 
and light loam. 
D. Chalk and Calcareous Soils. 
Chalk is found underlying the drift soils over the greater part of Norfolk, 
but in the eastern and central parts of the county it is usually so deeply 
situated that it does not affect the surface soils. In West Norfolk, however, 
an outcrop occurs, so that in some places real chalky land is found, derived 
directly from the chalk rock, while in others the drift overlying the chalk is 
decidedly calcareous in nature, due to admixture with the chalky subsoil. 
Comparatively little of this chalk soil was met with in the season’s work, so 
that it was not possible to definitely associate many species with such 
land. 
