Index 



Fertility: in Crepis, 414, 416, 420; 

 low, in triploids, 380. 



Fertilization, function of male gameti 

 in, 385. 



Fixations, fixatives, and methods of 

 staining, for Crepis, and for Viola 

 hybrids, 403 ; for Crepis chromo- 

 somes, 405. 



Fragmentation: of chromosomes, in 

 progeny of triploids, 383, in 

 tomatoes, 393, and origin of 

 species, 393, 395; of satellited 

 chromosomes in Crepis, 392. 



Fritillaria, spiral structure of chromo- 

 somes of, 409. 

 Frost, H. B., 81-190. 

 Galtonia, 366. 



Gamete, male, function of, in ferti- 

 lization, 385. 



Gametes: diploid, origin of, 385; 

 polyploid, 394. 



Gasteria, 366. 



Genetic analysis, value of trisomies 

 in, 391. 



Genetic factors, lethal, 122, 125, 157; 

 linkage of, 122, 130-35, 137-39; 

 balanced, 157. 



Genetic work on Matthiola, 84-85. 



Geum hybrids, pairing of chromo- 

 somes in, 418. 



Giant cell, Nawaschin 's theory of 

 origin of, 346. 



Ginko biloba L., Microsporogenesis 

 of, with Especial Keference to 

 the Distribution of Plastids and 

 to Cell Wall Formation, 243-48. 



Haploidy in Crepis, 389, 410. 



Heredity, of mutant types, 92; in 

 Oenothera, 82-83, 123, 127. 



Heterotypic meta-anaphase in Crepis, 

 409. 



Hieracium, 218. 



HoUingshead, Lillian, 343-54. 



Hybrids, Crepis: chromosome conju- 

 gation in, 417; causes of sterility 

 in, 418; meiosis in, and classifi- 

 cation of, 419. 



Inbreeding and Crossbreeding in 

 Crepis capillarls (L.) Wallr,, 



205-16. 



Inheritance of doubleness of flowers, 



122, 157. 

 Inheritance of Some Morphological 



Characters in Crepis capillarls. 



II, 217--i2. 



Inheritance in Crepis capillarls (L.) 

 Wallr. in. Nineteen Morpho- 

 logical and Three Physiological 

 Characters, 249-96. 



Interspecific crossability stimulated 

 by triploidy, 391. 



Interspecifi.c Hybrids in Crepis. I. 

 Crepis caplUaris (L.) Wallr. x 

 C. tectorum L., 191-204. 



Juglans, Studies In. I. Study of a 

 New Form of Juglans calif omlca 

 Watson, 1^6; II. Further Obser- 

 vations on a New Variety of 

 Juglans callfomlca Watson and 

 on Certain Supposed Walnut- 

 Oak Hybrids, 47-70; III. (1) 

 Further Evidence that the Oak- 

 like Walnut Originates by Muta- 

 tion. (2) A Parallel Mutation 

 in Juglans HindsU (Jepson) Sar- 

 gent, 71-80. 



Lathyrus, 366. See also Spiral struc- 

 ture of chromosomes, 

 odoratus, 72. 



Lilium, chiasmas in, 418. 



Lesley, Margaret M., 315-41; on 

 tomato chimeras and isolated 

 areas of tetraploid cells, 344. 



Lethal genetic factors, 122, 125, 157. 

 Linkage of genetic factors, 122, 130- 

 35, 137-39. 



Literature cited on: New variety of 

 Juglans, 57; Mutation in Mat- 

 thiola, 161; Morphological char- 

 acters in Crepis capillarls, 237; 

 Microsporogenesis of Ginko bi- 

 loba, 247 ; Inheritance in Crepis 

 capillarls, 280 ; Chromosome num- 

 ber and individuality in Crepis, 

 312, 339; Chromosomal chimeras 

 in Crepis, 350; Chromosome num- 

 bers and morphology in Trifol- 

 ium, 376; Studies on polyploidy, 

 395-96 ; Meiosis in Crepis, 423-25. 



Locus mutation, 82. 



Male gamete, function of, in ferti- 

 lization, 385. 

 Mann, Margaret C, 243-48, 297-314. 



Matthiola, 3(34; genetic literature re- 

 lating to, 84 ; variety ' ' Snow- 

 flake, " 83 ; study on hybrids of, 

 by Correns, by Von Tschermak, 

 84; genetic work of Saunders 

 on, 85; occurrence of apparent 

 mutants in, 89; characteristics 

 of mutant types in, 92-145; 

 statistical methods of mutation 

 in, 145-51. See also Mutation. 



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