Morphologie etc. — Varietäten etc. — Physiologie. 53 



Gau nie. J. , Contribution ä l'etude de La dehiscence du 



fruit chez les Sero tu larin ees. M<m. Diplome d'etud. supe'-r. 



32 pp. Paris 1909.) 



L'auteur Studie la dehiscence du fruit chez plusieurs especes de 



Scrofularinees appartenant aux genres Linaria, Digitalis, Veronica, 



Scrofularia et Melampyrum. II insiste sur la differenciation tardive 



de l'assise de dehiscence dans ces especes, et dresse im tableau 



permettant de reconnaitre les differents genres de Scrofularinees en 



se basant sur les caracteres des fruits. R. Combes. 



Harris, J. A., On the relationship between the length of 

 the pod and fertility and feeundity in Cercis. (Botan. 

 Gazette. L. p. 115-127. Aug. 1910.) 



In this study pods of Cercis canadensis are used to investigate 

 the intensit}' of the interrelationship between the length of the pod 

 and (a) the number of ovules formed, (b) the number of seeds 

 developing, and (c) the feeundity (i. e., the ratio of b to a). Apart 

 from the mathematical expression of relationships, it is concluded 

 that there is a morphogenic or physiological relationship between 

 the number of seeds developing and the length of the pod, amoun- 

 ting to say three-fifths of the gross correlation. M. A. Chrysler. 



Jeffrey, E. C, The Pteropsida. (Botan. Gazette L. 401—414. pl. 13. 

 Dec. 1910.) 



The writer here replies to certain criticisms which have been 

 made of his conclusions concerning the group Pteropsida, proposed 

 by him in 1900. New evidence for regarding the pith as fundamental 

 tissue included by the vascular tissues of the stele is furnished by 

 Onoclea germanica, in which plant not only parenehyma but also a 

 ramentum-covered epidermis and external air invade the cavity of 

 the central cylinder. It is also shown that fundamental tissue is in- 

 cluded by the vascular tissues of the leaf trace in Angiopteris and 

 other Marattiaceae, and that such traces present gaps similar to those 

 of cauline steles. The evidence for existence of foliar gaps in seed- 

 lings and in fossil representatives of the Osmundaceae is reviewed, 

 and it is concluded that there is no proof for the original absence 

 of foliar gaps in this family. From the persistence of concentric struc- 

 ture in leaf traces it is argued that the concentric type of tubulär 

 central cylinder was the primitive one in the stem. The viewismain- 

 tained that the Pteropsida represent a natural phylum of vascular 

 plants characterized by dorsisporangiate sporophylls and largeleaves. 



M. A. Chrysler. 



Köek, G., Eine Mutation der Kar toffels orte Up to date. 

 (Monatsh. Landw. p. 108 u. 109. 1 Abb. 1911.) 



In einem Bestand dieser Sorte von Solanum tuberosum wurden 

 1909 einige Pflanzen mit stark gekräuselten sehr grossen gewölbten 

 Blättchen beobachtet, welche als Mutationen betrachtet werden und 

 bei Vermehrung die Eigentümlichkeiten vererbten. Fruwirth. 



Abrahamsohn, B., Ueber die Atmung der Gerste während 

 der Keimung, insbesondere ihrer Abhängigkeit vom Ge- 

 halt an Ei weiss. (Dissert. 31 pp. Berlin, 1910.) 



Gerste lässt sich im Vakuum in beliebigen Mengen durch An- 



