Index 



Flower form, factor in Mendelian 

 heredity in Tabacum, 516. 



Flower Measurement, Apparatus for, 

 4.">5; illustrations of, -t.'Uj, 4.17. 



Fort Bidwell, California, 120. 



Fuchsia, 352, 359. 



Gasteria, 350. 



Geranium, genus, 357. 



Genetic aspects of problem of hered- 

 ity in Nicotiana hybrids, 301. 



Genotypes in Tabacum, 513, 520; ge- 

 netic behavior of leaf type of, 

 492-493, 516. 



Germination of tobacco seed, 96-100, 

 . 108, 109, 136, 199, 233, 451; sul- 

 furic acid method, 199-200, 203- 

 209, 219, 220; value of separation 

 of seed, 200; seed used, 201; ger- 

 minating conditions, 202, 203; re- 

 lation between age of seed and 

 its viability, 209-215, 220, 233, 

 240; hybrid vs. parent seed, 215- 

 219, 220, 241-247, 248; rate and 

 amount of germination, 240-247, 

 248; response to stimulation by 

 hybrids an<l parental pollen, 276- 

 281; effect of narcotic vapors on, 

 446; relation of light and dark- 

 ness to, 451-455; germinal differ- 

 ences in culture series of Nicoti- 

 ana Tabacum hyl)rids, 490. 



G-ermination of Tobacco Seed, Notes 

 on, 199, 233, 451. 



Goldschmidt, R., acknowledgment, 

 435. 



Goodspeed, T. H., 87, 169, 189, 199, 

 223, 233, 249, 273, 293, 301, 429, 

 435, 439, 451, 457; acknowledg- 

 ment, 417. 



Groth, B. H. A., work of, on Fi hy- 

 brids, 147. 



Harlan, H. V., cited, 512. 



Hasselbring, H., cited, 492. 



Hayes, H. K., cited, 514. 



Heliantliemum, genus, 357. 



Heredity, "unit character" concep- 

 tion, 174-186; physiology of, 177- 

 181, 197, 301; use of hypothetical 

 terms in connection with, 181; 

 conception of reaction system 

 contrasts in, 361 ; genetic aspects 

 of problem, 301; residual, in Nic- 

 otiana Tabacum, 515-516, 520. 



Hibiscus rosasinensis, 444. 



Histological investigation of abscis- 

 sion in Nicotiana hybrids, 296. 



Histology of the pedicel, 350, 412; 

 in Nicotiana, 363-365; in Lyco- 

 persicum, 365-366; in other gen- 

 era of the Solanaceae, 366. 



Hodgson, E. W., 439. 



Howard, Gabrielle L. C, cited, 511, 

 514, 517, 518. 



Humidity, influence on abscission 

 time, 397. 



Hydrogen, used in abscission experi- 

 ments, 447. 



Illuminating gas, induction by, of ab- 

 scission, 397-404, 443; relation 

 of concentrations of, to leaf-fall, 

 444. Sec also Narcotic vapors. 



Illuminating Gas and its Constitu- 

 ents, Effects of, in Causing Ab- 

 scission of Flowers in Nicotiana 

 and Citrus. 4.S9; composition of, 

 440; methods of experiment, 440; 

 results, 441, 442. 



Hlumination, effect on abscission, 397. 



Impaticns Sultani, .348, 350, 352. 



Inheritance in Nicotiana Hybrids, 

 Studies in, 87, 169, 223. 



Inheritance in Nicotiana Tabacum, A 

 Report on the Crossing of Cer- 

 tain Varieties, 457; quantitative 

 characters, 459, 513, 514-516; 

 bud variations, 459; interspecific 

 hybrids, 459; Mendelian, 459, 

 460 (which also see) ; occurrence 

 of strays, 462; features of, 514; 

 residual hereditj^, 515-516, 520; 

 linkage as a factor in, 516-517; 

 flower form factor in, 516; color, 

 flower, leaf base, leaf shape, 457, 

 passim; petiole, 457, passim. 



Injury, mechanical, 416. See also Ab- 

 scission. 



loehroma tuberosa 366, 398. 399, 441. 



Kendall, J. N., 293, 347, 443. 



Lagenaria, 351. 



Lamella, middle, dissolution of, 356, 

 376, 378, 379, 382, 384, 416. 



Lanceolata derivatives, 474, 478, 491. 



Latifolia derivatives, 474, 476-478; 

 X anqustifolia, 488; a complex 

 hybrid, 491. 



"Law of Dominance," 174. 



"Law of Segregation," 174. 



Leaf characters (base, habit, shape) 

 in hybrids, 307, 311, 467, passim. 



Light and darkness, influence of on 

 germination, 451, 455. 



Linkage as a factor in inheritance in 

 Tabacum, 516-517. 



Linum, genus, 357. 



Lipman, C. B., acknowledgment to, 

 289. 



Literature cited, 30, 152, 187, 198, 

 222, 231, 248, 290, 299, 322, 450, 

 520; summary of literature on ab- 

 scission, 350-361. 



Litmus, reaction of Nicotiana to, 381. 



Lloyd, F. E., acknowledgment to, 289. 

 ■ 41 7. 



Loriifolia derivatives, 474, 478-479, 

 491-492, 495. 



Lupinus, 446. 



[585] 



