GENERA AND SPECIES 



Urticace^ 

 Urtica dioica 



POLYGONACEiE . . . 



Polygonum Pennsylvanicum 

 Polygonum lapathifolium . 

 Polygonum persicaria 

 Polygonum aviculare 

 Polygonum scandens 



Polygonum cilinode . 

 Rumex crispus . 

 Rumex obtusefolius . 



CHENOPODIACEiE . . 



Chenopodium album 



Phytolaccace^ . . 

 Phytolacca decandra 



Caryophyllace^ . . 

 Lychnis alba . 

 Silene laiifoUa . 

 Saponaria officinalis 



NYAIPH^ACEiE . . . 



Nymphcea odorata . 

 Nuphar advena . 

 Nelumbo lutea . 



Ranunculace^ . . 

 Clematis Virginiana 

 Cimcifuga racemosa 

 Ranunculus acris 

 Thalictrum polygamum 

 Thalictrum purpurascens 



Nettle Family 

 Stinging Nettle 



PAGE 



2>Z 



Buckwheat Family 

 Pink Knotweed 

 Large White Knotweed . 

 Common Smartweed . 

 Knotgrass .... 

 Climbing False Buck- 

 wheat 38 



Fringed Black Bindweed . 40 

 Curled Dock .... 40 

 Broad-Leaved Dock . . 42 



36 



37 

 38 



Goosefoot Family 

 Lamb's-Quarters 



Pokeweed Family 

 Pokeweed . 



Pink Family 

 White Campion . 

 Bladder Campion . 

 Boimdng-Bet . 



Water-Lily Family 

 White Water-Lily 

 Spatter-Dock . . 

 American Lotus . 



44 



46 



48 

 52 



55 

 58 

 60 



Crucifer^ . . 

 Brassica nigra . 

 Brassica campestris 



Crowfoot Family 



Clematis 62 



Cimcifuga 65 



Buttercup 66 



Tall Meadow-Rue . . 68 



Purple Meadow-Rue . . 70 



Mustard Family 



Black Mustard ... 71 



Wild Turnip .... 74 



xvi 



