April, 1920] GENKTICS 151 



1023. Page, E. Judson. [Misprinted Sage.] Variability in plants. Gard. ChrOD. 65: 

 308, June 21, 1919. — Suggests that botanical classification should take into account 



bility in leaf and flower part number; classifying on a basis of the multipl 



the range of numbers rather than on the accepted basis of the numbers most frequently 

 occurring. [See Bot. Absts. 3, Entries 974,1022.] — John Bushnell, 



1024. Pascher, A. Ueber die Beziehung der Reduktionsteilung zur Mendelschen Spal- 

 tung. [The relation of the reduction division to Mendelian segregation.] Ber. Deutsche I 

 Ges. 36: 163-168. 1918. — Apparently a recapitulation of a previous paper describing 

 ments with Chlamydomonas, considered here in the light of Mendelian theory. — John Belling , 



1025. Pomeroy, Carl S. Bud variations in sugar cane. Jour. Heredity 10: 129-135. 

 Fig. 16-17. Mar., 1919. — An article indicating the importance of bud variations in su^'ar 

 cane, together with their place of origin, types, and frequent occurrence. The difference 

 between mother plants and sports is often as great as between recognized varieties. Bud 

 variations have been recorded, as: (1) Differently colored side shoots from one cane, (2) dif- 

 ferently colored canes in one stool growing from a single piece of. planted cane, (3) A stalk 

 with some joints striped and some unstriped, (4) Strains showing differences in hardiness, 

 (5) Strains showing differences in sugar content. — M. J . Dorsey. 



1026. Pusch, G. Inbreeding live stock. Jour. Heredity 10:88-89. Feb., 1919— An 

 abstract of an article by two German workers, Toggenburg and Erzgebirge, in which it was 

 shown that inferior animals were produced by excessive inbreeding in goats and sheep. — 

 M . J. Dorsey. 



1027. Rasmuson, H. [Rev. of: Dahlgren, K. V. O. Uber einige Kreuzungsversuche 

 mit Chelidonium ma jus L., Polemonium coeruleum L. and Lactuca muralis L. (On several 

 crossing experiments with Chelidonium ma jus L., Polemonium coeruleum L., and Lactuca 

 muralis L.) Svensk Bot. Tidskr. 12: 103-110. 1918.] Zeitschr. indukt. Abstamm. Vererb. 

 20:302-303. April, 1919. 



1028. Reed, H. S. Growth and variability in Helianthus. Amer. Jour. Bot. 6: 252-271. 

 8 fig. June, 1919. — Measurements on height of 58 plants of Helianthus annuus taken at inter- 

 vals of seven days for a period of eighty-four days during the grand period of growth. Growth 

 rate at first slow, maximum growth at about middle of grand period, after this decrease in 

 rate with the beginning of flower-bud formation. Variability of height, as expressed by 

 standard deviation and coefficient of variability was greatest at end of growing period. 

 Plants were classed into four groups according to height when first measured. Showed tend- 

 ency throughout to remain in initial groups, i.e., plants small in the beginning tended to 

 remain small, those tall in the beginning tended to remain tall. Concludes that height and 

 variability are not due to chance of environment alone, because there are large and consistent 

 discrepancies between standard deviations of observed percentage values of position of 

 plants in each of the four groups and standard deviation of mean percentages to be expected 

 if heights of plants were distributed according to pure chance. Fourteen tables and three 

 graphs are given. [See next following entry, 1029.] — Helene Boas Yampolsky. 



1029. Reed, Howard S., and R. H. Holland. The growth rate of an annual plant Heli- 

 anthus. Proc. Nation. Acad. Sci. [U. S. Amer.] 5: 135-144. Fig. 1-8, tables 1-5. 1919 — 

 Measurements of height of 58 plants of Helianthus at seven-day intervals during the grand 

 period of growth showed that growth rate approximated course of an autocatalytic react in. 

 Taken as indication that growth rate is governed by constant internal factors rather than by 

 external factors, as temperature or transpiration with neither of which marked correh 

 was found. [See next preceding entry, 102S.] — Helene Boas Yampolsky. 



1030. Roberts, H. F. The founders of the art of breeding. II. Jour. Heredity 10: 147- 

 152. Fig. 1. April, 1919.— See also Bot. Absts. 3, Entry 65. 



