February, 1920] HORTICULTUJii 45 



was most effective in following crosses: Ben Davis X Grimes, Grimes X Jonathan or Ben 

 Davis, and Ben Davis X Jonathan. No influence of pollen was found upon size, color, Bhape 



or quality.—.!/. J . Dorsey. 



306. Winge, C*. On the relation between number of chromosomes and number of types, 

 in Lathyrus especially. Jour. Genetics 8: 133-138. PI. 5. Apr., 1919. — Discusses in some 

 detail interpretation of genetic data in relation to cytological phenomena, particularly as 

 regards chromosomes and hypothesis that number of independently segregating factor pairs 

 in a given organism corresponds to haploid or a; number of chromosomes. Preparatory to study 

 of sweet pea (Lathyrus odoratus) from this standpoint, this species, together with Lathyrus 

 latifolius was cytologically investigated. Haploid chromosome number for each species is 

 7, diploid 14. All seven chromosomes are very similar in shape and size. Character of 

 cytological phenomena in both species is identical, preparations of one being indistinguishable 

 from those of the other. Finds no cytological support in observations on Lathyrus for chias- 

 matype hypothesis (in sense of Janssens). — Orland E. White. 



307. Winge, O. On the non-Mendelian inheritance in variegated plants. Compt. Rend. 

 Trav. Lab. Carlsberg 14 3 : 1-20. 4 fig- 1919. — Experiments with normal green and albo- 

 maculata variety of Humulus Japonicus showed that normal X albomaculata gave 746 normals 

 and albomaculata that albomaculata X normal male produced normal and 35 albomaculata; 

 and that albomaculata X albomaculata gave normals and 268 albomaculata. Mother plant 

 proved determinative for leaf color. Results are not due to apogamy since pollination was 

 necessary for fruiting; no data as to whether other qualities are transmitted by male. No 

 entirely white ("albina") nor self-colored green forms occurred and author considers heredi- 

 tary factors situated in cytoplasm (not including plastids) ; since transmission is maternal it 

 is supposed that no cytoplasm accompanies male gamete in fertilization. Surveying work of 

 other investigators author would explain Ikeno's results with albomaculata variety of Cap- 

 sicum annuum as due to similar cytoplasmic determiners, but would postulate that male 

 nucleus is accompanied by some cytoplasm. Since pure white or self-colored green forms 

 arise in Baur's Antirrhinum and Corren's Mirabilis, author considers these variegated cases 

 dependent on plastids (transmitted by egg) which may entirely separate out of some cells in 

 course of ontogeny or oogenesis. Baur's Pelargonium case is explained by plastids trans- 

 mitted by egg and male gamete. Author suggests that true heredity should be defined to 

 include qualities having material foundation in any part of cell belonging to organism itself — 

 nucleus, plastids, or c3'toplasm. Mendelism does not include all true heredity. — J. P. Kelly. 



308. Woods, Frederick Adams. Kaiserism and heredity. Jour. Heredity 9: 348-353. 

 1 chart. Dec, 1918. — An analysis of the family tree of the Caesars, in which the tyranny and 

 perfidy of Nero, Caligula and Agrippina "the Younger" are traced in true pedigree fashion, 

 as such traits descend, segregate and recombine in the earlier Caesars. — H. H. Laughlin. 



HORTICULTURE 



J. H. Gourley, Editor 



309. Anonymous. Why do Japan walnuts bear butternuts? [Rev. of: Willard G. 

 Bixby. Same title. Presented at Albany, Georgia, meeting of the National Nut Growers 

 Association.] Amer. Nut Jour. 10:5-6. PI. 1-5. 1919. — It has often been observed that 

 when Japan walnuts (Juglans sieboldiana and Juglans cordiformis) are grown in the United 

 States, the seedlings from these trees produce nuts as rough shelled as those of the butternut 

 (Juglans cinerea) or even more so. The various hypotheses advanced to account for this are 

 discussed and the conclusion is reached that it is due to hybridization with the native 

 butternut. — R. H. Taylor. 



310. Bailey, Herbert S. The production and conservation of fats and oils in the United 

 States. U. S. Dept. of Agric. Bull. 769. 4$ p. 1919— See Bot. Absts. 3, Entry 196. 



