158 Brenchley . — The Weeds of Arable Land in relation to 
Gnaphalium uliginosum . The habitats hardly correspond to those usually 
associated with the latter species.) 
Matricaria Chamomilla. Confined to light sandy soils, with one 
solitary notice on clay. No record from chalk. Occasionally dominant on 
sand. 
Matricaria hiodcra. Most frequently occurred on sandy soils, but was 
also found on clay. Seldom recorded from chalk. Dominant at times both 
on clay and sand. 
Senecio vidgaris. Universally distributed, and of very frequent occur- 
rence. Rarely dominant, and then on heavy soil. 
Sonchus arvensis. Universal in distribution, both as to soil and domi- 
nance. 
Thistles (usually Cardans arvensis ). Universally distributed as to 
soil. When dominant it was usually on the lighter types of soil, not on 
clay. 
Tnssilago Farfara. ‘Coltsfoot.’ Universal in distribution, found on 
all types of soil. Frequently in association with Equisetum arvense. 
Rarely dominant. 
Convolvulaceae. Convolvtdus arvensis. Universally distributed, both 
as regards soil and dominance. 
Scrophulariaceae. Bartsia Odontites. Recorded from heavy and light 
soils. Characteristic of heavy soils — clay ; scarce on light lands. 
Veronica agrestis . Of universal distribution, both as to soil and 
dominance. 
Veronica hederaefolia. Recorded from all soils except gravel, though 
rarely seen on chalk. Dominant on all types of soil. 
Labiatae. Mentha arvensis. Recorded from all soils but chalk. 
Frequently dominant on clay ; usually occasional or scarce on light land. 
Chenopodiaceae. Che7iopodium album . Characteristic of light sandy 
soils, though frequently found on clay. No record on chalk, and very 
scarce on gravel. Rarely dominant, and then on sandy soil. 
Polygonaceae. Polygonum aviadare . Very frequently found on sandy 
soils, and also occurred on clay. Very rare on chalk. Equally dominant 
on sand and clay. 
Polygonum Convolvidus. Most usual on sandy soils, but frequently 
found on clay. Absent from chalk and gravel. Only dominant on sandy 
soil. 
Polygonum Persicaria. Found on all soils except chalk. Only domi- 
nant on boggy land. 
Rumex Acetosella. Characteristic of acid sandy soils. 
Rumex crispus. Universally distributed. Probably more characteristic 
of clay and chalk than of light sandy soil. Dominant on clay, chalk, and 
gravel. 
