372 



INDEX 



340-1 ; somatic, 238; see also hy- 

 brids, segregation in 



self-fertilization and fertility, 188, 

 224, 229-31, 232, 237; see also fer- 

 tilization, fertility, and hybrids, 

 vigor of 



Seton, Alexander, experiments with 

 peas, 102-3; reference of Fccke 

 to, 214-15 



sexual affinity, 178, 187-8, 193-4 



sex cells in amphimixis, 181-2, 198, 

 209 



sex-determination, theory of Nageli, 

 202 



sex-inheritance, in animals, report 

 of Knight upon, 92 



sex in plants, 9-14, 16-19, 23, 29, 

 64-5, 66, 70, 71,. 77-8, 93, 160, 202 



sex-limited inheritance, 251 



sex-linked characters, 235-6, 253 



Shirreff, Patrick, 110-17; wheat- 

 crossing, 115-16; wheat-crossing, 

 technique of, 113-15; wheat- 

 crossing, reference to Knight, 174 



species-crosses, 99, 100, 187, 187, 

 208; see also Kolreuter, Gartner, 

 Wichura, and hybrids, etc. 



species-question, 95-6, 102, 128, 161, 

 178, 183. 185, 207, 226 



Spillman, W. J., 276-83 



spinach, experiments with, 12, 66 



Sprengel, C. K., 78-83 ; life, 78 



stature, inheritance of human, 246-8 



sterility, see fertility and hybrids, 

 sterility of 



stocks, see Matthiola 



Strabo, 3 



sweet peas, Galton's investigations 

 with, 245-6 



Sweet William, Fairchild's, 62, 65 



systematic affinity, see hybrids, sys- 

 tematic relationship in 



Thalictrum, hybrid, intermediacy 



in, 28 

 Theophrastus, 12 

 Tragopogon, hybrid, 22, 43 

 Trifolium, crosses of, 28, 331 

 Triticum, crosses of, 113-16, 151-4, 



276-82; dominance in, 116, 279-81 

 Tschermak, E. von, 343-57 



U 



UNIT-CHARACTERS, 121, 324, 327, 332, 



333, 334-5 

 unit-theory of heredity, 197, 271 



Vaillant, Linnaeus' opinion of, 19 



variability, 139, 233-4 



variation, bud, 138; "disordered," 

 133-55 153; in Camellia, 138, in 

 Rosa, 138; nature of. 109-10, 1 5'4, 

 194, 233-4, 271 ; of cultivated 

 plants, 137, 194; of first-genera- 

 tion hybrids (see hybrids), 1^9, 

 190. 194. 195: ^77 



variations, origin of, 137, 139-40; 

 selection of, 139, 140, 153-4 



variegations, inheritance of, 142-3 



Verbascum, crosses of, 23, 54, 127-S 



Verbena, cross of, 28 



Verlot, 136-43 



Veronica-Verbena hybrid, 22, 26 



vigor, of hybrids, see hybrids, vigor 

 of, fertility, and fertilization 



Vilmorin, Henry de, 144, 147-9, 



151-4 

 vilmorin, Louis de, 144-51 

 Vilmorins, work of the, 143-54 



W 



Wahlbom, J. G., 19, 29 



wheat, crossing, 113-16, 151-4; 



crossing, technique of, 1 13-14, 



115; dominance in, 116, 278-81; 



Mendelian results w!th, 276-83 ; 



see also Triticum 

 Wichura, Max Ernst, 178-83; list of 



crosses, 180 

 Wiegmann, A. F., 160-4; estimate of 



work, 164; list of crosses, 162 

 Wilson, John H., 275 

 winter-hardiness, inheritance of, 97, 



142, 227, 267 



Zea, crosses of, 157, 168, 171, 174-7, 

 329> 337, 338, 339, 349 ; experi- 

 ments with, 12-13, 68-70 



zygomorphism, dominance of, 235 ; 

 in crossing, 208 



