TABLE OF CONTENTS 



Page 



Introduction 7 



Crab grass 9 



Witch grass 11 



Barnyard grass 11 



Darnel 15 



Pennsylvania smartweed 15 



Wild buckwheat 17 



Night-flowering catchfly 19 



Cow cockle 19 



Purslane 23 



False flax 23 



Black mustard 25 



Five-finger 25 



Wild rose 27 



Mallow 31 



Evening primrose 31 



Dodder 33 



Sticktight , 33 



Blue vervain 37 



Catnip 37 



Buckhorn plantain 39 



Marsh elder 39 



Mayweed 43 



Prickly lettuce 43 



Perennial sow thistle 4? 



Summary 47 



