3d. XCH. No. 19. XXIV. Jahrgang. 



Botanisches Centralblatt 



Referirendes Organ 



der 



Association Internationale des Botanistes 



für das Gesammtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten : des Vice- Präsidenten: und des Secretärs : 



Prof. Dr. K. Goebel. Prof. Dr. F. 0. Bower. Dr. J. P. Lotsy. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, 



Chefredacteur. 



», ,q Abonnement für das halbe Jahr 14 Mark lQft? 



durch alle Buchhandlungen und Postanstalten. 



I ° I 



Alle für die Redaction bestimmten Sendungen sind zu richten an Herrn 

 Dr. J. P. LOTSY, Chefredacteur, Leiden (Holland), Oude Run 33 a. 



Referate. 



WRIGHT, H., Foliar Periodic itv in Ceylon. (Annais of 

 Botany. Vol. XVI. No. LXIV. " Dec. 1902. Notes, p. 594 

 —596.) 



The irregularity in the foliar periodicity in Ceylon is very 

 pronounced, there not being a month in which all the trees 

 are in füll leaf. Nearly 200 species become leafless at different 

 iimes of the year, the remainder being non-deciduous. The 

 majority of the former become leafless during the dry months, 

 some being completely defoliated tvvice a year, whilst others 

 exhibit a periodic increase in their foliage several times a year, 

 besides a complete annual renewal. It is pointed out that 

 complete defoliation and foliar renewal may tend to decrease 

 the time-value of the rings of growth in the secondary xylem. 



F. E. Fritsch. 



LlNTON, E. F., A New Erica Hvbrid. (The Irish Naturalist. 



Vol. XI. Aug. 1902. No. 8. p. 177—178.) 



Describes Erica Stuartii, a neu hybrid betvveen E. mediterranea 

 and E. Mackaii. The exsertion of the anthers is like that of the former 

 species, as well as the narrow tube of the corolla and the pale colour of 

 its lower part. F. E. Fritsch. 



Barnard, J. E. and Macfadyen, A., Luminous Bacteria. 

 (Annais of Botany. December 1902. p. 587—589.) 



The authors describe their methods of cultivating these 

 organisms and conclude that the luminosity is a function of the 



Botan. Centralbl. Bd. XCIL 1903. 28 



