CORN-FIELD EQUISETUM. 
77 
a b h 
CORN-FIELD EQUISETUM {natural size). 
Equisetum ARFENSE5 Linneus. 
This is, beyond all comparison, the most abundant of our 
British Equisetums ; indeed it is a serious nuisance to the farmer 
and gardener, whose utmost efforts to eradicate it frequently 
prove ineffectual. It appears to have little choice of locality, 
being equally common in dry and moist situations. 
