616 Varietäten etc. — Physiologie. 



Grunde, andere bildete weissbunte Blätter, andere ergrünten voll- 

 kommen. Bei anderen Temperaturen 5°— 6°, 12°, 24° könnten diese 

 Erscheinungen nicht beobachtet werden. G. v. Ubisch (Berlin). 



Hatai, S., The Mendelian ratio and blended inheritance. 

 (American Naturalist. XLV. p. 99—106. 1911.) 



From his investigations the author draws the following con- 

 clusions: 



1. The series obtained from the square of the binomial expres- 

 ses the distribution of determinants for both alternative and blended 

 inheritance. 



2. Blended inheritance may be considered to be a limiting case 

 of alternative inheritance where dominance is imperfect. Thus 

 Mendel's law of alternative inheritance may be considered as the 

 Standard and all other cases referred to it. 



3. De Forest's formula with its limiting case adequately repre- 

 sents frequencies of all known cases of inheritance when the num- 

 ber of allelomorphic pairs of characters is large, especially when 

 quantitative measurements are considered. Jongmans. 



Henrard, J. Th., Cochlearia hollandica nova hybrida {Cochlearia 

 anglica X C. officinalis). (Rep. spec. nov. XIV. p. 221. 1915.) 



Diagnose einer bei Amsterdam zwischen den Eltern gesam- 

 melten Hybride, die auch von der Ostsee bekannt geworden ist. 



W. Herter (z. Z. Kowno). 



Sündermann, F., Saxifraga aretioides X '^ledia G. Benth. et 

 Walk. (Allg. bot. Zschr. XXI. p. 22—24. 1915.) 



In einer Sendung lebender Saxifraga aretioides Lap. und 5. 

 media Gouan aus St. Beat in den Pyrenäen fand Verf. eine 

 ganze gleitende Reihe von Bastarden, die alle fruchtbar waren, 

 reichlich Samen trugen und wieder Zwischenformen lieferten. Elf 

 dieser Bastarde werden beschrieben und folgendermassen benannt: 

 f. grandiflora, f. parviflora, f. aurantiaca, f. flavescens, f. luteo Pur- 

 puren (Lap.), f. erubescens, f. Lapeyrousii (Don), f. ambigua (Lap.), 

 f. racetnifloraj f. Grenieri, f. Godroniana. Ferner beschreibt Verf. eine 

 künstlich erzogene Hybride S. aretioides X ^nedia X Friederici Au- 

 gusti Bias = S. Stuarti mit var. purpurea. 



W. Herter (z. Z. Kowno). 



Butler, J. B. and J. M, Sheridan. A preliminary account 

 of a new oedanometer for measuring the expansive 

 force of Single seeds, or similar small bodies, when 

 wette d. (Scient. proc. Roy. Dublin Soc. XIV. N. S. N». 35. p. 

 462—480. 4 text figs. 1915.) 



The fact that seeds and other organic bodies, during the swel- 

 ling which accompanies absorption of water, can exert a conside- 

 rable pressure has long been known. It is put to practical use on 

 such a case as the disarticulation of skulls through the swelling 

 power of peas. The authors describe and figure an Instrument de- 

 signed to record the pressure generated by Single large seeds or 



