58? 



glomerata 62. 



mexicana 62. 



racemosa 62. 



Schreberi 62. 



sobalifera 62. 

 Myrica cerifera 25. 

 Myricaceae 25. 

 Nabalus sp. 76. 

 Oenothera biennis 115. 



laciniata 115. 

 Oleaceae 60. 

 Onagraceae 16, 73, 115. 

 Onoclea sensibilis 18. 

 Oxalis cymosa 89. 

 Panicum capillare 58. 



virgatum 77, 104. 

 Peltandra virginica 100. 

 Pentstemon alpinus 37. 



hirsutus 37. 



pubescens 37. 

 Persicaria muhlenbergii 81. 



pennsylvanicum 81. 

 Phalaris cai'oliniana 85. 

 Phaseolus vulgaris 99. 

 Phleum pratense 79. 

 Phragmites Phragmites 86. 

 Pieris mariana 129. 

 Pinaceae 5, 6, 7. 

 Pinus contoita 6. 



echinata 7. 



palustris 1. 



ponderosa 8. 



rigida 2, 6. 



taeda 1, 7. 



virginiana 5, 7. 

 Plantago Rugelii 122. 



I'oa annua 59. 



fertilis 59. 



nemoralis 59. 



pratensis 59, 79. 



trivialis 59. 

 Poaceae 34, 37, 39, 41, 55, 57, 58, 

 59, 60, 62, 64, 77, 79, 83, 85, 

 86, 89, 90, 92, 95, 102, 104, 105, 

 113, 116, 122. 

 Podophyllum peltatum 80. 

 Polemoniurn reptans 116. 

 Pclygonaceae 81, 82, 90, 117. 

 Polygonum aviculai'e 90, 117. 



Convolvulus 82. 



emersum 81. 



erectum 117. 



pennsylvanicum 81. 

 Polypodiaceae 9, 17, 18. 

 Pontederia cordata 118. 

 Pontederiaceae 118. 

 Portulaceae 50. 

 Potentilla canadensis 31. 

 Primulaceae 67. 

 Prunus americana 98. 



cerasus 98. 



divaricatus 98. 



pumila 98. 



serotina 98. 



spinosa 98. 

 Ptelea trifoliata 95. 

 Pyrolaceae 15. 

 Pyrus coronaria 24. 



lowensis 24. 



Malus 24. 

 Quercus coccinea 7. 



densifolia echinoides 7. 



digitata 7. 



