172 



INDEX. 



Plum-knot, 12. 

 Poison ivy, 108, 150. 

 Polarity in plants, 104. 

 Pollen, 30, 80. 

 Pollen tubes, 79. 

 Polo, Marco, 163, 164. 

 Polygamous flower, 81. 

 Polypetalous flower, 35. 

 Polypores, 12. 

 Pome, 56. 

 Portulaca, 164. 

 Potato, 146. 

 Prior, Dr., 163. 

 Proterandrous, 88. 

 Proterogynous, 88. 

 Protococcus nivalis, 18. 

 Protoplasm, 73. 

 Puff-ball, 13. 

 Pumpkin, 153. 

 Pumpkin vine, 71. 

 Purslane, 163. 

 Pyrus, 60. 



Americana, 60. 



arbutifolia, 60. 



communis, 60. 



coronaria, 60. 



Cydonia, 60. 



mains, 60. 



prunifolia, 60. 



Quack grass, 145. 

 Quince, 56, 60. 



Radicle, 153. 

 Radish, 146. 

 Rafflesia, 36. 

 Raspberry, 57, 59. 

 Ray, Jolm, 44. 

 Rays, Gl. 

 Receptacle, 55. 

 Red maple, 46. 

 Red snow, 18. 

 Redwood, 133. 

 Regular flower, 36. 

 Rhizome, 145. 

 Rhubarb, 145. 

 Rivinius, 45. 

 Root-climbers, 108. 

 Root-hairs, 147. 

 Roots, talk about, 140. 

 Rosaceae, 54. 

 Rose, 57. 

 Rose family, 54. 

 Rosin-weed, 104 

 Rusts, 10. 



Salsify, 65. 

 Saprophyte, 6. 



Sapwood, 39. 

 Sarracenia purpurea, 119. 

 Sarracenia variolaris, 121. 

 Scliizaja, 26. 

 Scorzonera, 65. 

 Scouring rushes, 28. 

 Scramblers, 106. 

 Scrophularia, 88. 

 Scum on ponds, 18. 

 Sea-weeds, 15. 

 Seed, definition of, 2. 

 Seed-leaves, 3. 

 Segard, 67. 

 Self-fertilization, 83. 

 Senecio, 61. 

 Sepals, 30. 

 Service-berry, 60. 

 Sex, 77. 



Side-saddle flower, 119. 

 Simpson's bee-plant, 88. 

 Smilax, 37. 

 Snails, 93. 

 Snap-dragon, 7L 

 Solidago, 61. 

 Spawn, 14. 

 Spiraea, 59. 

 Sprengel, Conrad, 82. 

 Spore, 4. 



Squash plant, 140. 

 Stamens, 30. 

 Staminate flower, 35. 

 Stigma, 31. 

 Stocks, 163. 

 Stomata, 73. 

 Strawberry, 57, 59. 

 Style, 31. 

 Sundew, 125. 

 Sunflower, 66, 102. 

 Sunflower family, 60. 



Tabulae cells, 71. 

 Tamarack, 103. 

 Tape grass, 85. 

 Tendril -climbers, 112. 

 Ten-weeks' stocks, 163. 

 Thistle head, 136. 

 Toad-stools, 13. 

 Token, 135. 

 Touch-me-not, 97. 

 Toumefort, Joseph P. de, 45. 

 Tragus, Hieronymus, 44. 

 Trichomanes Petersii, 23. 

 Trimorphous, 92. 

 Tubers, 150. 

 Turnip, 146. 

 Twiners, 108. 



VacCinium. 164. 



