Neue Litteratur. 69 



ritance of Raphanus sativa. (Bot. Mag. Tokyo. XXXIII. p. (21)— (30). 



Japanese.) 

 Stout, A. B. 1919. Bud Variation. (Proc. nation. Ac. Sc. V. p. 130—134.) 

 Thompson, W. P. 1918. The inheritance of the length of the flowering 



and ripening periods in wheat. (Trans, r. Soc. Canada. 3. XII. p. 69 — 87.) 

 Tischler, G. 1917. Neuere Arbeiten über den Generationswechsel im 



Pflanzenreich. (Zschr. f. Bot. IX. p. 577—586.) 

 Trabut, L. 1919. Observations sur la descendance de Citrus hybrides. 



(Bull. Soc. Hist. nat. Afrique Nord. X. p. 89.) 

 Trabut, L. 1917. Variations des Eucalyptus dans les cultures. Quelques 



Eucalyptus hybrides observes principalement en Algerie. (Bull. 



Stat. Rech. Forest. Nord Afrique. I. p. 140—155. 6 f. 6 pl.) 

 Transeau, E. N. 1919. Hybrids among species of Spirogyra. (Amer. 



Nat. LIII. p. 109-119. 7 f.) 

 Ubisch, G. V. 1919. IL Beitrag zu einer Faktorenanalyse von Gerste. 



(Zschr. ind. Abst.- u. Vererb.-Lehre. XX. p. 65—117.) 

 Vries, H. de 1917. La selection directe dans les lignees pures. 



(Scientia. XXII. p. 1-15.) 

 Vries, H» de 1919. Oenothera rubrinervis, a half mutant. (Bot. Gaz. 



LXVII. p. 1-26.) 

 Vries, H. de 1919. Ueber erbliche Ursachen eines frühzeitigen Todes. 



(Di^ Naturw. VII. p. 217—222.) 

 Weatherwax, P. 1919. Gametogenesis and fecundation in Zea Mays 



as the basis of xenia and heredity in the endosperm. (Bull. Torrey 



bot. Club. XLVI. p. 73—90. 2 pl. 2 f.) 



Winge, Ö. 1919. On the non-Mendelian inheritance in variegated 

 plants. (C.-R. Trav. Labor. Carlsberg. XIV. 3. p. 1—21.) 



Winge, Ö. 1919. On the relation between number of chromosomes 



and number of types, in Lathyrus especially. (Journ. of Genetics. 



VIII. p. 133—138. 1 pl.) 

 Wölk, F. C. van der 1919. Onderzoekingen over blijvende modificaties 



en hun betrekking tot mutaties. (Cultura. 1919. p. 1—24. 1 pl.) 

 Zimmermann, W. 1919. Epipactis (Cephalanthera) alba X longifolia. 



(Allg. bot. Zschr. XXIII. p. 42—43.) 



VI. Physiologie. 

 Cf. XI. Linossier, 



Alstinne, E. van 1918. The movement of plant-food within the soil. 



(Soil Sc. VI. p. 281—308.) 

 Brown, W. H. 1918. The theory of limiting factors. (Philippine 



Journ. Sc. C. Bot. XIII. p. 345—350.) 

 Brown, W. H. and S. F. Trelease. 1918. Alternate shrinkage and 



elongation of growing stems of Cestrum nocturuum. (Philippine 



Journ. Sc. C. Bot. XIII. p. 353-360.) 

 Curtis, 0. F. 1918. Stimulation of root growth in cuttings by treat- 



ment with chimical Compounds. (Mem. Cornell agr. Exp. Stat. 



XIV. p. 71 — 138. 8 f.) 

 Folsom, D. 1918. The influence of certain environmental conditions, 



especially water supply, upon form and structure in Ranunculus. 



(Physiol. ResearchesII. p. 209—276. 24 f.) 

 Gillespie, L. J. and L. A. Hurst. 1918. Hydrogen-ion concentration — 



soil type ■ — common potato scab. (Soil Sc. VI. p. 219—236. 3. f.) 

 lehimura, T. 1919. On the localisation of anthocyanin in the spring 



leaves of some trees and shrubs in the temperate regions of 



Japan. (Bot. JMag. Tokyo XXXIII. p. 12—15.) 



