Ptilota, 161. 
Puke Family, 44. 
Punctaria, 165. 
Purple Avens, 48. 
Purple Azalea, 73. 
Purple Orchis, 108. 
Purple Thorn-apple, 86. 
Purple Trillium, 110. 
Purslane, 39. 
Purslane Family, 39. 
Pussy Willow, 99. 
Putty-root, 109. 
Pycvanthemun, 81. 
Pylaisza, 142. 
Pylaisea (Pterigynandrum), 172. 
Pylaiszees, 142. 
Pyrenopsis, 152. 
Pyrenula, 155. 
Pyrethrum, 66. 
Pyrola, 73. 
Pyxine, 151. 
Quaking Gress, 127. 
Quercus, 96. 
Quercus prinoides, 12, 97. 
Quick Grass, 127. 
Quillwort, 131. 
Rabbit-foot Clover, 45. 
Radish, 35. 
Radula, 145. 
Ralfsia, 164 
Ramalina, 149. 
Ranunculacee, 29. 
Ranunculus, 29. 
Ranunculus alismefolius, 29. 
Raphanus, 35. 
Raspberry, 49. 
Rattlesnake Fern, 132. 
Rattlesnake Grass, 125. 
Rattlesnake-root, 69. 
Rattlesnake-weed, 69. 
Red-ash, 89. 
Red Baneberry, 31. 
194 
Red-berried Elder, 59. 
Red Birch, 98. 
Red Cedar, 102. 
Red Clover, 45. 
Red Currant, 51. 
Red Hemp Nettle, 82. 
Red Maple, 43. 
Red Oak, 97. 
Red Osier Dogwood, 58. 
Red Pine, 12, 101. © 
Red Plum, 47. 
Red Snow, 168. 
Red-stemmed Plantain, 75. 
Red-top, 123. 
Reed Meadow Grass, 126. 
Rhabdonia, 160. 
Khamnacee, 43. 
Rhamnus, 43. 
Rhexia, 54. 
Rhinanthus, 80. 
Rhizocarpee, 132. 
Rhizoclonium, 168. 
Rhododendron, 73. 
Rhodomela, 159. 
Rhodomelee, 158. 
Rhodora (Rhododendron), 73. 
Rhodymenia, 160. 
Rhodymc nice, 160. 
Rhus, 42. 
Rhynchospora, 118. 
Ribbon Gtrass, 129. 
Ribes, 51. 
Rib-grass, 75. 
Riccia, 144. 
Ricciaces, 144. 
Rice Cut Grass, 122. 
Rich-weed, 82, 95. 
Rinodina, 153. 
River Birch, 98. 
Rivularia, 168. 
Robinia, 45. 
Robin’s Plantain, 63. 
Rock Maple, 438. 
Rock Rose Family, 36. 

