196 



MIDDLESEX FLORA. 



Plum, 30. 



Plumbaginacese, 65. 

 Poa, 130. 

 Podophyllum, 3. 

 Podostemacese, 90. 

 Podostemon, 90. 

 Pogonatum, 145. 

 Pogonia, 104. 

 Poison Hemlock, 42. 

 Poison Ivy, 21. 

 Poke, 83. 



Polemoniacese, 77. 

 Polygala, 22. 

 Polygalacese, 22. 

 Polygonacese, 86. 

 Polygonatum, 108. 

 Polygonum, 86. 

 Polypodium, 135. 

 Polypody, 135. 

 Polypogon, 127. 

 Polysiphonia, 152. 

 Polytrichum, 145. 

 Pond Lily, 4. 

 Pondweed, 99. 

 Pontederia, 110. 

 Pontederiacese, 110. 

 Poplar, 96. 

 Poppy, 4. 

 Populus, 96. 

 Porphyra, 153. 

 Porphyridium, 158. 

 Portulaca, 17. 

 Portulacaceae, 17. 

 Potamogeton, 99. 

 Potato, 78. 

 Potentilla, 31. 

 Poterium, 31. 

 Pottia, 141. 

 Poverty Grass, 125. 

 Prairie Clover, 26. 

 Prairie Dock, 51. 

 Prenanthes, 59. 

 Prickly Ash, 20. 

 Prickly-pear, 39. 



Primrose, 65. 

 Primulacese, 65 

 Prince's Feather, 86. 

 Prince's Pine, 63. 

 Privet, 82. 

 Proserpinaca, 37. 

 Protococcaceffi, 158. 

 Protococcua, 158. 

 Prunus, 30. 

 Ptelea, 20. 

 Pteridophytes, 135. 

 Pterigynandrum, 146. 

 Pteris, 135. 

 Pulse, 23. 

 Punctaria, 154. 

 Purple Cone-flower, 51. 

 Purslane, 17. 

 Pycnanthemum, 71. 

 Pylaisia, 146. 

 Pyrenula, 174. 

 Pyrola, 63. 

 Pyxine, 168. 



Quaking Grass, 130. 

 Queen of the Meadow, 46. 

 Quercus, 92. 

 Quick Grass, 133. 

 QuiUwort, 139. 

 Quitch Grass, 133. 



Kacomitrium, 142. 

 Eadish, 10. 

 Eadula, 1501 

 Eagweed, 51. 

 EaUsia, 155. 

 Eamalina, 166. 

 Eanunculacese, 1. 

 Eanunculus, 2. 

 Eaphanus, 10. 

 Easpberry, 32. 

 Eattle-box, 28. 

 Eattlesnake Grass, 130. 

 Eattlesnake Plantain, 103. 

 Eattlesnake-weed, 58. 



