Index 



Carbon dioxide, 447, 448, 449. See 

 also Narcotic vapors. 



Carbon monoxide, 449. See also Nar- 

 cotic vapors. 



Cavala tobacco, 5, 233; illustration 

 of, opp. 34, 463. 



Cell separation, with abscission, 354, 

 413, 416; method of, 376-384; 

 enzj^me problem of, 383; time of, 

 in spontaneous abscission, 396; 

 induction of, 404; figures show- 

 ing, opp. 422, 424, 428. 



Cell turgor, 376, 379-380, 413, 404, 

 413. 



Cestrum fasciculatum, 366, 371, 398, 

 411. 



Chloroform. See Narcotic vapors. 



"Chorismus," 3.55. 



Cinnamomum, 354. 



Citnts, abscission of flowers in, 439, 

 441, 443; effects of illuminating 

 gas, 445, 449. See also Abscission. 



Citrus limonia, 445. 

 var. Eureka, 441, 449. 

 sinensis var. Washington Navel, 



441, 445, 446, 449. 

 var. Valencia, 441, 449. 



Clausen, E. E., 301, 435, 457. 



Comes, cited, 2, 3, passim, 458, 510, 

 511. 



Complexity of character differences 

 in Tahacum varieties, 459-460, 

 4fiS. 470. 491. 



Controlled Pollination in Nicotiana, 

 429. 



Corolla, abscission of, 357; in Nicoti- 

 ana, 383, 413; illustrated, 383; 

 in Datura, 384, 413. 



Corolla color in calycina-virginica 

 series, 497-501. 



Corolla diameters, in N. acuminata, 

 quantitative expression of imper- 

 fect dominance in, 117-168; 

 plates showing fluctuations in, 

 opp. 164, 166, 168; tables of 

 measurements of, 224-226 ; method 

 of measuring, 227. See also Dom- 

 inance, imperfect. 



Crocus, effect of ])oisonous gases on 

 germination in. 446. 



Cross-pollination, 127, 135. 189, 248, 

 263, 267, 269, 275, 277, 29.3, 295, 

 387. 



Cuba, lenqua fie vuca tobacco, 492. 



Cucumis, 351. 



Cucurhita, 359. 



Culture series in Nicotiana Taharum. 

 See Alha-macrophylla ; Angustifo- 

 lia-macrophylla ; Calycina-virgi- 

 nica. 



Cuplme, 350. 



Cytology, study of. in relation to 

 abscission in Nicntiann hybrids, 

 296, 432; in "separation layer," 



[584] 



352; in genera of the Solanaceac, 

 366; changes in, accompanying 

 abscission, 376-377; of the pedi- 

 cel in Nicotiana, 363-365; illus- 

 trated, 363; in Lycopersicum, 365- 

 366; illustrated, 365. 



Darkness and light, influence of, on 

 germination, 451. 



Datura, 350, 367, 382, 402, 403, 412; 

 abscission of stvle and corolla, 

 383-385. 

 sanguineum, 366, 398, 411. 

 stramonium, 444. 



Davidson, Pirie, 429. 



Dominance, Law of, 174. 



Dominance, in inheritance of charac- 

 ters in Nicotiana hybrids. 111, 

 112, 118, 312, 313, 314, 316, 320, 

 321. 

 Imperfect, in corolla diameters, 

 117, 168; experimental materials, 

 119; growing conditions, 123; de- 

 scription of Nicotiana flower, 125; 

 'technique and method, 126-132; 

 experimental work, 132, 136; 

 measurement of diameters, 138; 

 results, 144, 145; literature, 152; 

 plates showing, opp. 164, 166, 

 168. 



Don, G., cited,. 2. 



Drosophila, 512. 



Drought, effect on abscission, 397. 



East, E. M., cited, 514. 



Environment, influence on Tahacum, 

 513. 



Erodium, genus, 357. 



Ether. See Narcotic vapors. 



Ethylene, 449. See also Narcotic va- 

 pors. 



Euonymus, 354. 



Exfoliation, distinction between, and 

 abscission, 348. 



Ferric chloriile, used in nutrition ex- 

 periment on Nicotiana, 285. 



Fertilization, relation of, to abscis- 

 sion, .387, 391, 407, 416, 431-433; 

 selective, 434. 



Floral abscission, 294-298, 366, 408, 

 413, 417, 444. 448; following non- 

 or unsuccessful pollination, 296; 

 histological and cytological in- 

 vestigation of, 296. 



Floral characters in F, hvbrids: 457, 

 passim ; \'o\or, 307-311, 313; leaf, 

 307-311; flower (habit, size, etc.), 

 223-227. 307-311, 312; inheritance 

 of, 169-174, 228. 229, 230, 435; 

 "unit-character" problem in, 

 175; influence of age, 229; range 

 of variability, 229-230; plates 

 showing, 324-344; apparatus for 

 measuring size, 435-438. See also 

 Corolla diameters; Mendelian no- 

 tation, etc. 



