
silvicola, Wiztchc. & Chase, 1 
lanuginosum, (P. pubescens), 7 33 53 58 
latifolium, 17 32 33 36 46 55 58 
lindheimeri, Vash, 1 33 58 
microcarpum, 33 3657 58 
perlongum, 45 
polyanthes, Schult, 1 
Porterianum, 33 58 98 
- pyreforme, 61 
scoparium, 17 18 48 58 
spretum, (P. xztidum), 33 
virgatum, 45 61 91 . 
xalapense, (P. laxiflorum), 48 56 61 } 
Paspalum laeve, 8 58 : 
mucronatum, (P. fluztans), 45 58 65 82 93 
setaceum, 17 58 61 65 
Peltandra virginica, (P. undulata), 20 109 
Phalaris canariensis, 14 72 84 
Phleum pratense, 17 32 
Phragmites communis, 99 110 
Poa annua, 17 45 84 
autumoualis, (P. flexuosa), 45 
brachyphylla, (P. drevifolia), 58 
_ Chapmaniana, 65 
_ compressa, 29 32 57 84 
nemoralis, 48 58 61 99 
pratensis, (common.) 
serotina, (common. ) 
sylvestris, 45 110 
trivialis. 
Pogonia trianthrophora, (P. pexdula), 20 22 48 
Polygonatum commutatum, (P. giganteum), 5 14 32 45 58 
65 106 
Pontederia cordata, 29 32 82 109 
Potamogeton americanus, (P. fluztans), 45 55 65:75 91 
amplifolius, 98 
foliosus, (P. pauciflorus.) 
Friesii, (P. mucronatus), 85 98 
heterophyllus, 82 
hybridus, 16 17 55 94 
Spicatus. 
illinoensis, 98 110 
natans, 57 
pectinatus, 9 45 65 
Potamogeton pulcher, 57 82 
pusillus, 48 
Rhynchospora capillacea. 
Sagittaria calycina fluitans, 40 
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