148 



INDEX 



Page 



Pepper-vine 122 



Persea 124 



pubescens 124 



Persicaria 114 



Phyla 135 



Pickerel-weed 107 



Pickerel-weed family 106 



Pilostaxis .-. 120 



Pimpernel, water 132 



PINACEAE 68 



Pinckneya 138 



pubens 138 



Pine family 68 



Pine, pond 68 



Pinus 68 



serotina 68 



PIPERACEAE 112 



Pipewort 106 



Pipewort family 106 



Pistia 103 



stratiotes 103 



Planera 113 



aquatica 113 



Pluchea 139 



foetida 139 



imbricata 139 



petiolata 139 



quitoc 139 



Plumegrass 84 



brown 84 



giant- 84 



narrow _- 84 



Polygala 120 



baldwinii 120 



cymosa 120 



lutea 120 



ramosa 120 



rugelii 120 



POLYGALACEAE 120 



POLYGONACEAE 113 



Polygonum 114 



coccineum 114 



densiflorum 115 



hirsutum 115 



hydropiper 115 



hydropiperoides 115 



lapathifolium 115 



longistylum 115 



opelousanum 115 



pensylvanicum 115 



persicaria 115 



punctatum 115 



sagittatum 114 



setaceum 115 



Page 



POLYPODIACEAE 67 



Pondweed 69 



horned 71 



Pondweed family 69 



Pontederia 107 



cordata 107 



lanceolata 107 



PONTEDERIACEAE 106 



Potamogeton 69 



americanus 70 



amplifolius 70 



angustifolius 71 



berchtoldi 71 



bicupulatus 70 



bupleuroides 71 



capillaceus 70 



diversifolius 70 



epihydrus 70 



foliosus 71 



gramineus ^ 71 



illinoensis 71 



natans 70 



nodosus 70 



pectinatus 71 



perfoliatus 71 



pulcher 70 



pusillns 71 



Primrose family 132 



PRIMULACEAE 132 



Privet, swamp 133 



Proserpinaca 129 



amblygona 129 



intermedia 129 



palustris 129 



pectinata 129 



plalycarpq 129 



Psilocarya 94 



corymbifera 94 



nitens 94 



scirpoides 94 



Ptilimnium 131 



capillaceum 131 



costatum 131 



nodosum 131 



nuttallii- 131 



Purslane, water 125 



Quillwort-. -. 68 



Quillwort family 68 



Ranunculacere 118 



Ranunculus 118 



ambigens 118 



delphinifolius 118 



