INDEX. 



273 



Boots, absorption through, 34, 35. 



Koots, growth of, 12. 



Boots, propagation by, 34. 



Bootstock, 47, 48. 



Boots, storage of nourishment in, 



32, 33. 

 Boots, structure of, 30-82. 

 Boot-system, 33, 34. 

 Botation of protoplasm, 129. 

 Eussian thistle, 201, 202, 205. 



Sage, fertilization in flowers of, 



171, 172. 

 Sago-palm, 72. 

 Salver-shaped, 147. 

 Sap, descent of, 69. 

 Sap, rise of, 58, 68, 69, 116. 

 Saprophytes, 121. 

 Sapwood, 59. 

 Scalloped, 87. 

 Scape, a naked or merely bracted 



peduncle, rising from the ground, 



as in the dandelion. 

 Sclerenchyma, 64. 

 Secondary growth, 62, 63. 

 Secondary root, 26. 

 Sedge, rootstock of, 48. 

 Section, wood, 53, 54, 56, 57, 59, 60. 

 Seed, 4-25. 



Seeds, dispersal of, 200-202. 

 Seed-leaf, 5. 

 Seedling, parts of, 12. 

 Selection, natural, 212. 

 Self-fertilization, 160. 

 Sepal, 137. 



Separated flowers, 145. 

 Seguoia, 44. 



Series, plants form a, 217. 

 Serrate, 87. 

 Sessile, not stalked, as leaves with- 



out petioles, or anthers without 

 Jilarp,ertts. 



Shrub, 43. 



Sieve-plate, 55, 56. 



Sieve-tube, 55, 56. 



Silica, 117. 



Simple leavesj 91. 



Simple pistil, 147. 



Sinuate, 87. 



Sleep of leaves, 98, 99. 



Slime-moulds, 126-128. 



"Smilax," 50, 51. 



Sori, 241. 



Spatulate, 87. 



Species, 213. 



Spike, 1.32, 133. 



Spine, 207, 208. 



Spiral vessel, 59. 



Spirogyra, study of, 221-224. 



Spore, 126-128. 



Squash-seed, 4, 5. 



Stamen, 143. 



Stamen, parts of, 146. 



Staminate, containing stamens hut 

 not pistils. 



Standard, one of the petals in a 

 papilionaceous flower (the large 

 upright one shown in Fig. 195). 



Starch, 21-23, 72. 



Starch disappears during germina- 

 tion, 23. 



Starch-making, 119-121. 



Starch, testing seed for, 21, 22, 



Stem, 38-76. 



Stem, early history of, 61, 62. 



Stem, functions of cells of, 58, 59. 



Stemless plants, 44. 



Stem, modiflability of, 50, 51. 

 Stem, monocotyledonous, 64-66. 

 Stems, storage of food in, 72. 



