162 



INDEX 



Pith, 27, 149. 

 Pith rays, 27. 

 Pleurococcus, 93. 

 Plumule, 2. 



Polemonium Family, 72. 

 Pollen, 47. 149. 

 Pollination, 48, 5(3, 04, 71. 

 Polypetalous, 57. 

 Pond scums, 98. 

 Pore, 122. 

 Potato, 22. 

 Prairies, 70. 

 Prickles, 20. 

 Primary roots, 10. 

 Primrose Family, 69. 

 Prop roots, 13. 

 Protonema, 135. 

 Prune Family, 63. 

 Pruninu;, 61. 

 Puff-balls, 124. 



Raceme, 57. 



Kadicle, 10. 



Kay, 86. 



Receptacle, 54. 



Red cedar, 154. 



Red seaweeds, 112. 



Resin ducts, 149. 



Rhizoids, 107. 



Rhizomes, 23, 57, 139. 



Riccia, 130. 



Rincr, 122. 



Rockweed, 109. 



Roots, 10-17; adventitious, 11; 

 forms of, 12 ; primary, 10 ; sec- 

 ondary, 11; structure of, 11; 

 tap-root, 10. 



Root-cap, 11. 



Root-hairs, 11, 12. 



Root-tip, 11. 



Rose Family, 60. 



Rusts, 126. 



Scape, 54. 



Scientific name, 100. 



Scouring rushes, 143. 



Seeds, 1-7 ; bean, 1 ; corn, 3 ; 



pine, 4 ; experiments with, 9 ; 



composition of, 5 ; physiology 



of, 9, 10. 

 Seed coat, 2, 



Seed leaves, 2. 



Seedlings, 7-10. 



Seed plants, 147-156. 



Seed table, 6. 



Selaginella, 145. 



Sepal, 52. 



Sessile, 51. 



Seta, 136. 



Sexual reproduction, 107. 



Smuts, 127. 



Soil, 13, 65, 66. 



Sori, 140. 



Species, 100. 



Sperm cells, 114, 135. 



Spirogyra, 98. 



Sporangia, 120, 136, 140. 



Spores, 100, 122, 140. 



Sporophyll, 50, 141. 144, 149. 



Sporophyte, 133, 136, 138. - 



Spraying, 63-64. 



Spruce, 152. 



Spur, 67. 



Stamens, 47. 



Standard, 64. 



Stele, 11. 



Stems, 17-32 ; features of, 17 ; 

 climbing, 20 ; miscellaneous, 

 25; modified, 21; physiology 

 of, 29, 31 ; structure of, 26. 



Stigma, 48. 



Stipules, 32. 



Stomates, 33, 132, 140. 



Strobilus, 144, 145. 



Style, 48. 



Sweet pea, 64. 



Symbiosis, 129. 



Sympetalous, 69, 70. 



Tables, algjii, 96, 102-111 ; coni- 

 fers, 155 ; climbing stems, 21 ; 

 commercial woods, 28 ; ferns, 

 142 ; fruits, 81 ; leaves, 38, 42, 

 43, 49 ; mosses, 134 ; pines, 

 151 ; review, 158 ; rhizomes, 

 23 ; roots, 14 ; seeds, 5 ; stems — 

 twigs, 19, 29, 30 ; stems — mod- 

 ified, 23 ; woods, 151. 



Tap-root, 12. 



Temporary mount, 93. 



Tendrils, 20. 



Tests, 5, 9, 12, 14. 



