Index 



Matthiola, Mutation in, 81-190. 



Meiosis in Cropis, 4120. 



Meiosis in Cropis liyl)rids, 405-22; 

 and clnssififation of species, 419, 

 4L'2. 



Meiosis in Two Species and Three 

 Hybrids of Crepis and its Bear- 

 ing on Taxonomic Kelationship. 

 401-32. 



Mendelian inheiitanco of c-hromosome 

 size, 364. 



Mcta-anaphase, heterotypic, in Crepis, 

 409. 



Micronuclei and tetrads in Crepis 

 aspera x C. l)ursifolia, 414. 



Microsporogenesis of Ginko biloba 

 L. with Especial Reference to 

 the Distribution of the Plastids 

 and to Cell Wall Formation, 243- 

 48. 



Migration of species, and polyploidy, 

 390, and triploidy, 394. 



Mitosis in normal triploids, 380. 



Morphology of Crepis chromosomes, 

 401. 



Morphology and Chromosome Num- 

 bers in Trifolium, 355-76. 



Mutants, occurrence of, apparent, 89. 



Mutation: definitions of, 81; kinds 

 of, 81; factor, locus, 82; in 

 Datura, 83; methods of experi- 

 mentation for, 85; experimental 

 data concerning, 89. See also 

 Matthiola. 



Mutation in Matthiola, 81-190. 



Xavasliin, M., 377—100. 



Nicotiana glutinosa, and N. tabacuni, 

 totraploid hybrid between, 348. 

 tabacum. Sec N. glutinosa. 



Nicotiana hybrids, pairing of chromo- 

 somes absent in, 417. 



Nucleolus, chromosome satellites con- 

 nected with, 411. 



Octoploid cells, in Spinacia oleracea, 

 347. 



Oenothera, heredity in, 82, 123, 127; 

 tri])loids in, 383, and their prog- 

 eny, 389. 



Pairing of chromosomes, absent in 

 certain Nicotiana hybrids, 417; 

 in hybrids following the Drosera 

 scheme, 418; in Gcum, and in 

 Tragopogon liybrids, 418. 



Para.syndesis, in Crepis, 406. 



Parthenogenic development of diploid 

 eggs, and formation of diploid 

 offspring in Solanum, 388. 



Pisuni, 'M')t\. 



Podophyllum, spiral structure of 

 chi-oinosomes in, 409. 



Pollen: formation and fertility of, in 

 Crepis, 420; diploid, possibility 

 of, 385. 



Polyploid : cells, in Anasa tristis, 346 ; 

 series in Trifolium, 374; plants 

 derived from triploids, 384; egg 

 cells in Crepis capillaris, 384; 

 hybrids highly A-iable and fertile, 

 391; gametes in Crepis, 394. 



Polyploids: origin of, and climate, 

 390; higher, produced in Crepis 

 by triploids, 381. 



Polyploidy: effect of, on tempo of 



develojiment, 390; and migration 



of species, 390. 

 Polyploidy, Studies on. I. Cytologi- 



cal Investigations on Triploidy 



in Crepis, 377-400. 

 Plant breeding, value of triploids in, 



394. 

 Primula kewensis, origin of, 348. 

 Prophase of meiosis in Crepis species, 



406. 

 Quercus agrifolia, 3, 13-15. 

 dumosa, 15. 

 lobata, 14, 15. 



Ran, v., 217-42. 



Reduction division of Crepis capil- 

 laris X C. aspera, 401. 



Satellite and nucleolus in Crepis, 379. 



Satellited chromosomes in somatic 

 metaphase, 367. 



Satellites, free: of Trifolium chromo- 

 somes, 367; of chromosomes con- 

 nected with nucleolus, 411. 



Selective elimination, in Snowflake 

 type of Matthiola, 121, 132, 152. 



Smear method vs. sectioning, for 

 Crepis, 403. 



Solanuni, tetraploidy in, 346; partlie- 

 nogenetic formation of diploid 

 offsj)ring in, 388. 



Somatic chromosomes in triploids, 379. 



Species of classification and meiosis 

 of hybrids, 419. 



Species crossing in Trifolium, 370-71, 

 375. 



Species differentiation, 373. 



Species formation, 394. See also Tri- 

 ])loids. 



Spinacia oleracea, tetraploid and octo- 

 ploid cells in dermatogen of, 347. 



[436] 



