INDEX. 



251 



Siphonese, 22, 34. 



Sisyrinchium. See " Blue-eyed grass." 



Skunk cabbage, 157. 



Slime mould, 12, 14; Fig. 5. 



plasmodium, 12. 



movements, 13. 



feeding, 13. 



spore-cases, 13. 



spores, 13. 



germination of spores, 14. 

 Smart-weed. See " Polygonium." 

 Smilacese, 155. 

 Smoke-tree, 198. 

 Smut, 64, 65. 



Smut-corn. See " Ustillago." 

 Snow-berry, 223. 

 Soft-tissue, 112. 

 Solanum, -ese, 215. 

 Solomon's Seal, 154; Fig. 83. 

 Soredium, 74. 

 Sorus, 118. 



SpadiciflorsB, 153, 157. 

 Spadix, 157. 



Spanish bayonet. See " Yucca." 

 Sparganium. See "Bur-reed." 

 Speedwell. See " Veronica." 

 Spermaphyte, 128-129. 

 Spermatozoid, 28, 36, 40, 46, 51, 89, 96, 



106, 122. 



Spermogonium, 79, 80. 

 Sphagnum, -acese, 99, 100. 



sporogonium, 100. 



leaf, 100. 

 Spice-bush, 188. 



Spiderwort, 6, 151, 157 ; Fig. 85. 

 Spigelia. See "Pink-root." 

 Spike, 181. 



Spikenard, 202 ; Fig. 110. 

 Spinach, 184. 



Spindle-tree, 199 ; Fig. 109. 

 Spirogyra, 30-32; Fig. 18. 



structure of cells, 30. 



starch, 31. 



cell-division, 31. 



sexual reproduction, 32. 



Sporangium, 55, 62, 113, 121, 122, 131, 

 148, 151, 179. 



Spore-case. See " Sporangium." 



Spore-fruit, 51, 66, 69, 70, 73, 83. 



Spore-sac. See " Ascus." 



Sporocarp. See "Spore-fruit." 



Sporogonium, 87, 90, 102, 123. 



Sporophyll, 128, 131, 148. 



Sporophyte, 109. 



Spring-beauty, 185 ; Fig. 98. 



Spruce, 142. 



Spurge. See " Euphorbia." 



Squash, 221. 



Staining agents, 4, 231, 233. 



Stamen, 128, 143, 148, 174, 179. 



Standard, 207. 



Staphylea. See " Bladder-nut." 



Starch, 31, 95, 152. 



Statice. See ' Sea-rosemary." 



Stellaria. See ' ' Chickweed . ' ' 



Stemonitis, 13 ; Fig. 5. 



Sticta, 75 ; Fig. 45. 



Stigeoclonium, 26; Fig. 14. 



Stigma, 145, 148, 175, 179. 



St. John's-wort, 195; Fig. 105. 



Stock, 192. 



Stoma. See " Breathing-pore." 



Stone-crop, 202 ; Fig. 113. 



Stone-fruit, 206. 



Stone-wort. See " Characese." 



Stony-tissue, 110. 



Stramonium, 215. 



Strawberry, 171, 202, 206; Fig. 113. 



Style, 148, 175, 179. 



Stylophorum, 187; Fig. 103. 



Sugar, 8, 145. 



Sulphur, 2. 



Sumach, 198 ; Fig. 108. 



Sun-dew, 192, 193 ; Fig. 104. 



Sun-flower, 224. 



Suspensor, 180. 



Sweet-flag, 157. 



Sweet-potato, 214. 



Sweet-scented shrub. See " Caly can- 

 thus." 



