CONTENTS. 
Introductions. 2 ees Scars 392). Ghose 
Gbliéction ane enbirag of artign. - oo a SS Te Ze 
ek ce ee eee 
RE eee a a cen nee eee Bea 
san ates ere ee ee ts Sots 3 
Couch grass... SPE ig BE ea ee eee re ae 
Pokewieed so ee Feta Pat es SSA Se OP be a Oe 
Tansy Ooo ns oe ee See Oh aS) Ree Come nee eh 6 et ee eee eee oe See ewe e ee eee 
eg po Aistetets ois Seem tee ee Slee ie 
BST ica Ea i brace nts ir wile ie eae oon 6 
OO ee ee ee ee ae 
. Canada fleabane..--..~--.---.--+--++-++---+---+-- ae Pee Se 
Purple Rien Rr oc ot ee ee 
Pose Seep eS oes es cs oa eee BOS tee ee 
dasa we ake 
