CONTENTS 



Page 



Plants with oval or oblong floating leaves 3-13 



Floating Pondweed 4 



Oakes Pondweed 4 



Heartleaf Pondweed 5 



Bog Pondweed 5 



Variable Pondweed 6 



Illinois Pondweed 6 



Bigleaf Pondweed 7 



Longleaf Pondweed 8 



Red Pondweed 9 



Ribbonleaf Pondweed 9 



Snailseed Pondweed 10 



Vasey Pondweed 10 



Marsh Smartweed 11 



Water Smartweed 11 



Watershield 12 



Broadleaf Waterplantain 12 



Upright Burhead 12 



Water Arrowhead 13 



Longleaf Mudplantain 13 



Plants with only oval, oblong, or lance-shaped underwater leaves . 14-17 



Redhead- grass 14 



Whitestem Pondweed 15 



Curly Pondweed 15 



Variable Pondweed 16 



Illinois Pondweed 16 



Bigleaf Pondweed 17 



Red Pondweed 17 



Plants with only threadlike or ribbonlike underwater leaves . . . 18-29 



Alga Pondweed 18 



Vasey Pondweed 19 



Snailseed Pondweed 19 



Northern Naiad 20 



Southern Naiad 20 



Slender Naiad 21 



Horned-pondweed 21 



Slender Pondweed 22 



Fries Pondweed 22 



Leafy Pondweed 23 



Hill Pondweed 23 



Bluntleaf Pondweed 24 



Flatstem Pondweed 24 



Water-stargrass 25 



Ribbonleaf Pondweed 25 



Fern Pondweed 26 



Widgeongrass 27 



Sago Pondweed 27 



Bigsheath Pondweed 28 



Threadleaf Pondweed 29 



Western Pondweed 29 



