Index 



sylvestris, 29, 189, 261, 262, 277, 



296, 302, 303, 350, 387, 388, 389, 



411, 448, 459; plate showing, opp. 



86. 

 Tahacum, 3, 261, 296, 302, 350, 352, 

 353, 454, 455; types of, 4-11, 

 460-461 ; plate showing hybrid 

 seedlings of, opp. 168; races in, 

 458-459, 491; taxonomic i^rob- 

 lems, 461 ; origin and interrela- 

 tionships of varieties of, 510- 

 513; influence of environment, 

 513; teratological forms in, 

 513; residual heredity in, 515- 

 516, 520. 



var. alba. See Alia-macrophylla 

 series. 



var. angiistifoUa, 7, 9, 10, 233, 

 262; description of (height, 

 habit, leaf, flower, etc.), 463- 

 465. See also Angustifolia- 

 macrophylla series. 



var. anricnlata, type derivative, 

 475, 479, 484-485; X macro- 

 l^hylJa, 488; X sessUifoUa, 489. 



var. hrasiUensis ("Brazilian"), 

 4, 262, 463. 



var. caJycina, 6, 262, 461; plate 

 showing, opp. 38. 

 "Cavala," 262, 463. See also Ca- 

 vala tobacco. 



var. coJossca, 19. 



var. commutata, 16. 



var. fruticosa, 6, 7. 



var. liavanensis, 4. 



var. lancifoJia, 6. 



var. macrophyUa, 5, 8, 89, 90, 233, 

 262, 277, 398, 399, 411, 461-463; 

 description of, 465-467; con- 

 trasted with alba, 505. See also 

 Alba-macropltylla ; Angustifolia 

 macrophyUa. 



var. purpurea. 10-11, 189, 262, 

 441; plate showing, opp. 46. 

 "Marvland," 5, 233, 262, 390, 398, 

 401, 411, 461. 



var. sanguiuea, 11. 



var. sessilifolia, type derivative, 

 475, 480, 485; 'x macrophyUa, 

 487; X aurifulaia, 489. 



var. ste7wp]iyUa, tvpe derivative, 

 474, 47.5-476, 484, 485; X auri- 

 culata, 489. 



var. virginica, 6, 89, 90, 461. 

 tomentosa, 18, 19, 262, 303; plate 



showing, opp. 74. 

 trigonophylla, 28. 



var. ipomopftiflorn, 29. 



var. puUa, 29. 



var. sordida, 29. 

 vincaeflora, 24, 122. 

 viscosa, 23. 



Nicotiana hybrids, inheritance in, 87, 

 117, 169, 223, 457, passim; weight 

 of seeds, 87-116; technique and 

 methods of experiment, 126-131; 

 flowering tendency, 304. 

 Seed: size, 91; color and weight, 

 92; germination, 96-101; devel- 

 opment, 101-103; conclusions re- 

 garding, 108, 109; abortive 

 (phenospermic), 265. See also 

 Germination of tobacco seed; 

 Mendelian inheritance in Nico- 

 tiana Tdlxicum. 



Nicotiana Hybrids Made with N. syl- 

 vestris as a Parent, Partial Ster- 

 ility of, 1S9, 27;i, 293. 



Nicotiana Hybrids, Quantitative Stu- 

 dies of Inheritance in, 87, 169, 

 223. 



Nicotiana Tahacum, Inheritance in. 

 A Report on the Results of the 

 Crossing of Certain Varieties, 



457. 



Niles, California, 121. 



Nitrogen (sodium nitrate), used in 

 nutrition experiments on Nicoti- 

 ana, 283. 



Nutrition, in relation to pollen ger- 

 mination, 280-281; in relation to 

 sterility and flower-fall, 281-289; 

 ferric chloride used in experi- 

 ments in, 285. 



Oxyhathus, 350, 353. 



Parthenogenesis, Parthenocarpy, and 

 Phenospermy in Nicotiana, 249- 

 271, 274-275. 



Partial Sterility of Nicotiana Hybrids 

 Made with A^. sylvestris as a Par- 

 ent, 189, 273, 293. 



Pa via, 351. 



Pelargonium, genus, 357. 



Pedicel, histology of, 350; technique 

 of examination, 361; increase in 

 size and development of mechan- 

 ical tissues, 369-371; induction 

 of abscission in, 399-404, 414; 

 throwing ofl" of, 410'; figures show- 

 ing, opp. 420, 422, 426, 428. 



Persian tobacco, 22. 



Peru, 17, 19. 



Petum angiu^tifolium, 9. 



Petunia, ,367. 



hybrida, 366, 398, 399, 411. 



Pctunioides, 19-30. 



Phenospermy, application of term, 

 265, 269. 



Plienotypo variation, 490, 493. 



riios])liorus used in nutrition experi- 

 ments on Nicotiana, 283. 



Physiological "unit characters," 177- 

 181, 197. 



Physiology of Nicotiana hybrids, prob- 

 lems "of, 275, 297, 313-314. 



[587] 



