2 Varietäten, Descendenz, Hybriden. — Physiologie. 



the pod. 5) The presence or absence of fasciation. 6) Habit of growth. 

 7) Duration. 



The new results described by the author deal principally with 

 the inheritance of colour in the testa, corolla, and leaf axils, which 

 has now been completely worked out. 



The author shows that the inheritance of these characters can 

 be described in terms of the following five pairs of allelomorps : 

 Dominant Allelomorph. Recessive A'llelomorph. 



Gray testa; coloured leaf axils Absence ofpigment, except 



(red in the absence of P); coloured Chlorophyll and allied substan- 

 flowers (red in the absence of P). C ces, in petals, axils, and tes- 



Marked Spotting, of some shade of tas c 



purple, on the testa S Spotting very faint, or absent. s 



Maple marking present M Maple marking absent . .m 



Presence of factor modifying red pig- Purple factor absent . . . p 



ment to purple P 



Dark hylum D Pale hylum d 



A sixth factor would be required to meet Tschermak's case 

 of the occurrence of plants having coloured flowers but green axils. 



S and P are always quite invisible in the absence of C; and M 

 is very nearly invisible when C is absent. 



The author finds that the character of fasciation is one which 

 is very susceptible, as regards the degree to which it is developed, 

 to the influence of environment. 



He points out that, to the seven pairs of allelomorphs recognized 

 by Mendel, six new pairs have been definitely added, while indi- 

 cations are observed of the existence of others. The principal gaps 

 now remaining in our knowledge of heredity in this genus relate 

 to the inheritance of the purple pod, and to the factors concerned 

 in the determination of the number and length of the internodes. 



From the study of wild peas obtained from Palestin e and from 

 Ceylon, the author has been enabled to obtain a near idea of the 

 appearance of the wild type from which the cultivated species has 

 been produced. He remarks on the interesting fact that the dominant 

 member of each pair of allelomorphs represents the primitive 

 character, in at least 12 out of the 13 pairs which are definitely 

 recognized. R. P. Gregory. 



Jong, A. W. K. de Di ff er en ces individuelles dans la te- 

 neur en alcaloides des plantes de coca. (Rec. Trav. chim. 

 Pays-Bas et Belgique. XXVII. p. 16-24.) 



- Ce travail a ete execute dans le but de determiner, si ces diffe- 

 rences individuelles sont suffisamment grandes pour oser esperer un 

 profit d'une selection. La quantite d'alcaloides qu'on obtient, de- 

 pend de la production des feuilles et de la quantite d'alcaloides qui 

 se trouve dans les feuilles cueillies. 



En comparant 10 plantes, par la methode colorimetrique en fai- 

 sant usage d'une Solution de Mayer, l'auteur a constate par de nom- 

 breuses experiences, que la force vegetative et la production d'alca- 

 loides sont assez inegales. II reste ä determiner si les proprietes 

 a\^antageuses sont hereditaires. T. Weevers. 



Jong, A. W. K. de Quelques remarques sur les plantes 

 cyanogenes. (Ann. Jard. bot. Buitenzorg. XXII. p. 1 — 17.) 



Sur les indications de M. Treub, l'auteur s'est propose d'abord 



