INDEX 



Alisma plantago-aquatica, 12 

 subcordatum, 12 

 triviale, 12 

 Arrowhead, Water, 13 

 Brasenia schreberi, 12 

 Burhead, Upright, 12 

 Echinodorus berteroi, 12 



rostratus, 12 

 Heteranthera limosa, 13 



dubia, 25 

 Horned-pondweed, 21 

 Mudplantain, Longleaf, 13 

 Naiad, Northern, 20 

 Slender, 21 

 Southern, 20 

 Najas flexilis, 20 



gracillima, 21 

 guadalupensis , 20 

 Persicaria muhlenber gii , 11 

 Polygonum amphibium, 11 

 coccineum, 11 

 natans, 11 

 Pondweed, Alga, 18 



Bigleaf, 7, 17 

 Bigsheath, 28 

 Bluntleaf, 24 

 Bog, 5 

 Curly, 15 

 Fern, 26 

 Flatstem, 24 

 Floating, 4 

 Fries, 22 

 Heartleaf , 5 

 Hill, 23 

 Horned- , 21 

 Illinois, 6, 16 

 Leafy, 23 

 Longleaf, 8 

 Oakes , 4 

 Red, 9, 17 

 Ribbonleaf, 9, 25 

 Sago, 27 

 Slender, 22 

 Snailseed, 10, 19 

 Threadleaf, 29 

 Variable, 6, 16 

 Vasey, 10, 19 

 Western, 29 

 Whitestem, 15 

 Potamogeton alpinus, 9, 17 



amplif olius , 7, 17 

 angust ifolius , 6, 16 

 berchtoldi, 22 

 bicupulatus, 10, 19 



Potamogeton--cont . 



capillaceus, 10, 19 

 confervoides , 18 

 cr ispus , 15 

 curtissii, 23 

 diversif olius, 10, 19 

 epihydrus, 9, 25 

 filiformis, 29 

 fluitans, 8 

 f oliosus , 23 

 friesii, 22 

 gemmiparus, 22 

 gramineus ,6,16 

 heterophyllus , 6, 16 

 hillii, 23 

 illinoensis, 6, 16 

 interior, 29 

 lateralis, 22 

 latifolius, 29 

 longiligulatus , 22 

 lucens, 6, 16 

 natans, 4 

 nodosus , 8 

 oakesianus, 4 

 oblongus, 5 

 obtusifolius , 24 

 pectinatus, 27 

 perfoliatus, 14 

 porteri, 23 

 praelongus, 15 

 pule her, 5 

 pusillus , 22 

 richardsonii , 14 

 robbinsii, 26 

 spirillus, 10, 19 

 st ricti f olius , 22 

 tennesseensis , 9, 25 

 vaginatus, 28 

 vaseyi , 10, 19 

 zosterif ormis , 24 



Redhead- grass , 14 



Ruppia maritima, 27 



occ identalis , 27 

 spiralis, 27 



Sagittaria stagnorum, 13 

 subulata, 13 



Smartweed, Marsh, 11 

 Water, 11 



Waterplantain , Broadleaf, 12 



Watershield, 12 



Water-stargrass , 25 



Widgeongrass , 27 



Zannichellia palustris, 21 



Zosterella dubia, 25 



a V.S- GOVERNMENT PRINTING OFFICE ; 1964 O - 735-942 



