3IO 



INDEX. 



Ringing plants, 1 1 . 

 Roast-beef plant, 105. 

 Roman tombs, seeds in, 113. 

 Root tips, I ; sap of, 23 ; sheath, 



25. . . 



RosacecB, variation in the, 252. 

 Roses, 98. 

 Rtimex acetosa, 126. 

 Ruskin, Prof., on fruits, 93. 



Salicaceai, variation in, 216. 



Saltwort, 154. 



Salvias, 87. 



Samaras of Maple, etc., 112. 



Sanderson, Dr. Burdon, 268. 



Sap of roots, 23 ; circulation of, 26. 



Sarcode, comparison of, with sap, 



12. 

 Sarracenias, the, 269, 273. 

 Scrophzilariacece, the, 85, 124. 

 Sea-fir, the, 12. 

 Seeds, 108, 113. 

 Self- fertilisation, Darwin on, 67. 

 Setiecio jacobcza, 1 1 1 . 

 Service-tree, the, 99, loi. 

 Shapes of leaves, Grant Allen on, 3 1 . 

 Sickening of land, 10. 

 Silica in plants, 130, 133. 

 Sizes of fruits, 96, 

 Smz'lax, 51. 



Snakes and poisonous plants, 119. 

 Social plants, 161, 163, 165. 

 Solanacea;, poisonous character of, 



118. 

 Solanum dtdcamara, 53, 118; 



jiignwi, 118; iuberosmn, 118. 

 Sorrel, Common, 126; Wood, 126. 

 Spanish chestnut, pollen of, 221. 

 Speedwells, the, 124. 

 Spencer, Herbert, 58, 60. 

 Spindle-tree, the, 105, 106. 

 Spines of Thistle, etc., 153. 

 Sports in plants, 12. 

 Spring flowers, 162. 

 Stamens, 53. 

 Stapelias, the, 138. 



Stems, nodes and internodes of, 30. 

 Stomata, function of, 27. 

 Stones of fruits, 97. 

 Strawberry-roots of, 58; common, 



Darwin on, 71 ; common, 99 ; 



receptacle of, 99. 

 Strychnos g&rms, the, 119. 

 St?ychnos nux-vomica, 119. 

 Sumachs, the, 117. 

 Sundews, the, 258. 

 Suppression of nodes, etc., 30; of 



floral parts, 210, 211. 



TaMUS ELEPHANTIPES, 53. 



Tannin in bark, 121, 128; fruits, 



128 ; ferns, 129. 

 Teazel, 112, 127, 283. 

 Tecotna radicans, 50, 

 Tendrils, 51 ; sensitiveness of, 54. 

 Tentacles of Sundews, 262. 

 Teratology of Cabbage-leaf, 269. 

 Thalictnim, stamens of, 197. 

 Thistle, 99, 102, no. 

 Thrum-eyed Primrose, 79. 

 Thynms so-pyllifolia, 72. 

 Tilia Eiiropma, 113. 

 Toad-stools and beetles, 125. 

 Tomato, the, 118, 

 Tragopogon pratensis, no. 

 Traveller's-joy, 53. 

 Treat, Mrs., on Bladder worts, 258, 



280. 

 Tree-ferns, 44, 45, 

 Trifoliate leaves of Clover, 157. 

 Trimorphism, 80. 

 Tropoeolum, the, 54. 

 Tropical Forests, Wallace on, 231 ; 



Bates on, 232 ; Gosse on, 233 ; 



Kingsley on, 233. 

 Twining of plants, 51, 52; double, 



oi Hibbertia, 53. 

 Tyndall, Prof., on perfumes, 137. 

 Typical numbers in flowers, 209. 



Umbelliferous flowers, 171. 

 Uiricularias, the, 279. 



