264 



INDEX 



Saprophytism, 80 



Sardinia, 144 



Sassafras, 170 



Scarlet tanager, 151 



Schizaea pusilla, 155 



Schouw, 142 



Schouw's hypothesis, 141 



Scutellum, 224 



Seed-bearing ferns, discovery of, 



201 

 Segregation, law of, 60 



Mendelian, 61,62 



ratio of, 61 

 Selfing, 66 

 Self-pruning, 32 

 Semon, 143 

 Senecio, 148 

 Sequoia, 168, 169 



gigantea, 168, 178 



sempervirens, 168, 178 

 Seychelles, 145 

 Shepherd's purse, 95 

 Shield fern, n, 95 

 Shirley poppies, 113 

 Sigittaria, 246 

 Silcne odontlpetala, 222 

 Siphonogamj, 133 

 Skunk cabbage, 80 

 Slate, 1 88 

 Small, James, 147 

 Snakes, 87 

 Solanaceae, 171 

 Solatium integrifolium, 50, 51 



nigrum, 50, 51 

 Solomon archipelago, 151 

 Sorus, 8 



Spartina cynosuroides, 224 

 Special creation, doctrine of, 79 

 Spencer, Herbert, 43, 97 

 Spencerites, 134 

 Spermatophytes, 130 

 Sperms, 21, 22, 23 



Sphenophyllum, 184 

 Sphenopsida, 238 

 Sphenopteris Hoeninghausi, 201 

 Spiranthes Romanzoffiana, 157 

 Spirem, 36 

 Spirogyra, 194, 196 

 Sporangia, 8, 10, 1 1 

 Sporangiophore, 8 

 Spore-production, consequence of 



enormous, 131 

 Spores, dispersal of, 17 



germination of, 17, 18 



reproduction by, 32, 50 

 Sporophyll, 9 

 Sporophylls, 6, 7, 8, 1 1 

 Sporophyte, 33 



steps in the evolution of the, 132 

 Sporophytes, 8 

 St. Helena, 148 

 Stangeria eriopus, 207 



paradoxa, 207 

 Sterilization, 14 



progressive, 126, 128 

 Stigmaria, 246 

 Stolons, 1 6, 17 

 Strawberry, 113 

 Strobiloid theory, 218, 219 

 Struggle for existence, 94, 96, 153 

 Stumps, Fossil tree, 191 

 Sunflowers, red, 113 

 Sweet flag, 80 

 Sweet peas, 66 

 Switzerland, 145 

 Sykes, Miss, 134 

 Symmetry, bilateral, 19 

 Symplocarpus fatidus, 155 

 Synangia, 209 

 Synapsis, 37 

 Synizesis, 37 



Taal volcano, 152 



Tamus communis, 226, 227 



