IXDEX 



209 



Spermatozoor , 121 

 Spermiogenesis, in animals. 119-122 



in bryophytes, 153 



in ferns, 151 



in gymnospt. nis. 148, 149 



in mosses, 154 

 Sphacelaria (brown alga;, 5(j, 7.3 

 Sphaerocarpos (liverwort), 187, 189 

 Spinal cord, 24 

 Spindle, 61, 62, 68 

 Spindle-attachment region, 8.") 

 Spindle elongation, 71 



.Sp'Vof/i/ro (green alga), 30, 34, 37, 1.56, I.' 

 Spirotrichonprnpha (protozoan), 93 

 .Spore-bearing organs, 18 

 Sporocyte, 138, 139 

 Sporodinia (fungus), 162 

 Sporophyte, 136 

 Sporophytic budding, 146, 242 

 Spruce, 78 

 Squash, 3, 19 

 Stains, 5, 8, 38, 52-54 

 Stamen hairs, 65. 66 

 Stangeria (cycad). 149 

 Starch, 31, 41, 42 

 .Statistical methods, 8 

 Sterility, in hybrids, 217-220 

 Stern, 181 

 Sterols, 50 



Stigeoclonium (green alga), 17 

 Stocks, 167 

 Stomates, 82, 207 

 Strangeways, 3 

 Stroma, 31 



Structural hybrid, 196, 216, 224, 241 

 Structure proteins, 49 

 Sturtevant, 181 

 Stypocaulon (brown alga), 68 

 Suberin, 77 

 Sugar, 30, 31, 38 

 Sugary endosperm, 178, 179 

 Surface activit.\', 46 

 Surface film, 45 

 Surface tension, 70 

 .Surface-volume ratio, 13 

 Swingle, 68 



.Synap,sis, 99, 103, 108. 11.5 

 Sync.vtium. 15, 16 

 Synergids. 139, 140, 142 

 Syngamy, in algae. 1.56—161 



in angiospenns. 140-143 



in animals, 123-127 



in a.sconiycetes, 164 



in basidiomycetes, 163 



in bryoph.vtes, 154-155 



in ferns, 152 



iti gymnosperms, 149 



in hybrids, 217-220, 239, 241 



Taraxacum (angiosperm), 242 



Taxonomy and cytolog.\ , 23 1-24!) 



Telezynski, 27 



Telokinetic chromosomes, 80 



Telophase, 63 



Tendons, 49 



Teosinte, 218, 219, 238, 239, 241 



Teosinte-maize hybrid, 218 



Terminalization, 110 



Tertiary split. 111 



Testcro.ss, 170 



Tetrad chromosome, 103 



Tetrakaidecahedron, 74 



Tetraploidy, 20.5-209 



Tetrasomic ratios, 208-210 



Tetraspores, 160, 161 



Theophrastus, 1 



Thixotropy, 48 



Thymonucleic acid, 87, 96 



Tissue culture, 3, 6, 7, 73 



Tissues, 20 



Tityus (scorpion), 110 



Tobacco, 30, 31, 210, 222 



Tomato, 146, 207 



Tonoplast, 38 



Torus, 76 



Tractile fibers, 62, 71 



Tradescantia (angiosperm), cell division, 4 



cell plate, 66 



chromosomes, 199 



geographic distribution and polyp!oid\ . 243 



living nucleus, 27 



meiosis, 113 



reciprocal translocation, 199 



somatic mitosis, 56, 72 



spiral chromonemata, 93 

 Translocation, 195-201 

 Trichocyst, 133 

 Tiichogyne, 160 



Trillium (angiosperm), 63, 87, 90, 91, 93, 109 

 Triple fu.sion, 143 

 Triploidy, 209 



Tripsacum (angiosi)erm), 238 

 Trisome, 174 

 Trisomic plants, 212 

 Trisomic ratios, 174 

 Triticum (angiosperm), amidiidiplnidy, 223 



chromosomes and taxonomy, 237 



reciprocal translocation, 197 

 Triton (salamander), 70 

 Trilurus (newt), 211 

 Trivalent chromosome, 115, 207 

 Trochodendron (angiosi>erm), 78 

 Trophoplasm, 25 



Tube cell, or nucleus, 137, 138, 141 

 TuUp, 209 



Tunicate ear, 178, 179 

 Turesson, 246, 247 

 Turgor, 36 



Tall character, KiO, 173 

 Tannin, 38, 77 

 Tajjetal Plasmodium, 137 

 Taiietum, 16, 137 



U 



Ulothrii (green alga), 156, 157 

 Ultraviolet liglit, 8. .50, 96 

 I'ndulating membninc, 22 



