230 



INDEX 



Stems, 133 



color, 141 



direction of growth, 139 



duration, 139 



Figs. 75-84, pp. 134-144. 



fractures, 144 



functions, 133 



general characters, 133 



gross internal structure, 144 



method of growth, 133 



modifications, 134 



modified, 139 



nature, 133 



odor, 145 



origin, 133 



outline of sections, 144 



surface, 143 



taste, 145 



texture, 139 



units of structure, 133 

 Sterilization, 41 

 Stigma, 111, 184 

 Stipe, 111 

 Stipules, 151, 154 



Fig. 89, p. 152 

 Stolons, 70, 80 

 Stomata, 60 



Stoneroot, Figs. 90, 93, pp. 153, 157 

 Strawberry, Fig. 126, p. 198 

 Strobilus, 205 



Fig. 131, p. 203 

 Style, 111, 112, 184 

 Subterranean hyphse, 46 



mycelium, 52 



plants, 139 

 Subulate outline of leaves, 159 



Fig. 96, p. 161 

 Succulent blade of leaf, 171 

 Sumac, Fig. 97, p. 162 



staghorn, Fig. 102, p. 167 

 Sundew, Fig. 103, p. 168 

 Sunflower, Figs. 95, 109, pp. 160, 

 179 



seed, Fig. 122, p. 193 

 Sunken bud, 149 



surface of roots, 131 



Fig. 73, p. 128 

 Superposed bud, 149 



Fig. 85, p. 147 

 Sutures, 182 

 Sweet cicely, Fig. 129, p. 201 



flag, Figs. 75, 106, pp. 134, 173 



pea, Figs. 81, 97, 113a, pp. 141, 

 162, 183 



Sweet William, Fig. 109, p. 179 

 Sycamore, Fig. 134, p. 212 

 Symmetrical flowers, 186 

 Syncarpous flower, 183 

 Synconium, 197 



Fig. 128, p. 200 

 Synergids, 116 

 Syngenesious stamens, 182 



TANACETUM vulgare, Fig. 108, p. 



175 



Tansy, Fig. 108, p. 175 

 Tap root, 130 



Fig. 71, p. 126 

 Taraxacum officinale, Fig. 93, p. 



157 

 Tear-thumb, Figs. 78, 92, pp. 137, 



155 



Tendrils, 139, 155 

 Terminal and hairy buds, Fig. 85, 

 p. 147 



stem bud, 122 

 Testa, 106, 117, 208 

 Tetrandrous flower, 182 



Fig. 114, p. 183 



Texas snakeroot, Fig. 76, p. 135 

 Thalaspi arvense, Fig. 132, p. 205 

 Thallophytes, 21 

 Thallus, 26 



Thornapple, Fig. 132, p. 205 

 Thorns, 139, 155 



Thuja occidentalis, Fig. 131, p. 203 

 Tickfoil, Canada, Fig. 96, p. 161 

 Tiger lily, Fig. 77, p. 136 

 Tilia americana, Figs. 100, 102, 



134, pp. 165, 167, 212 

 Tissues, 18 

 Toadstools, 52 



Tobacco, Indian. See Indian to- 

 bacco. 



Tomato, Fig. 124, p. 195 

 Torus, 177 

 Toxins, 39 



Triandrous flower, 182 

 Tricarpellary gynoecium, 183 

 Trichogyne, 32, 33 

 Trifolium pratense, Figs. 89, 97, 



108, pp. 152, 162, 173 

 Trimerous flowers, 118 

 Triticum sativum var. vulgare, 



Fig. 122, p. 193 



