Band 134. Nr. 25 XXXVIII. Jahrgang. I. Bd. Nr. 25. 



Botanisches CentraMatt 



Referierendes Organ 



der 



Association Internationale des Botanistes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Präsidenten: des Secretärs: 



Dr. D. H. Scott. Prof. Dr. Wm. Trelease. Dr. J. P. Lotsy. 



und der Redactions-Coynmissions- Mitglieder : 



Prof. Dr. Wm. Trelease, Dr. C. Bonaventura, A. D. Cotton, 



Prof. Dr. C. Wehmer und Dr. C. H. Ostenfeld. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 25. 



Abonnement für das halbe Jahr 15 Mark 

 durch alle Buchhandlungen und Postanstalten. 



1917. 



^ Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 R idaction des Botanischen Centralblattes, Haarlem (Holland), Spaarne 17. 



Rushton , W., Structure ofthe Wood ofHimalayanJuni- 

 pers. (Journ. Linn. Soc. Bot. XLIII. N'J 2S8. p. 1—13. 1 pl. 1913.) 



This memoir records the results of an investigation of the 

 wood of Jiinipenis reciirva, Harn., /. Wallichiana, Hook. f. & Thoms. 

 (syn. J. pseudosahina, Fisch. & Mey.), /. niacropoda, Boiss. (syn./. 

 excelsa, ßrandis, non Bieb.) and /. communis L. The structure of 

 the wood of these species is described and compared in detail. In 

 all the species the tracheids are short and the medullary rays are 

 resinous. Resin cells occur in all four species, but are found in 

 different areas of the growth ring. The nature of the rims above 

 and below the pit areas in the tracheids (Sanio's rims) is shown to 

 agree with that of the same structures in the East Indian Pines in 

 being pectic and not cellulosic. Agnes Arber (Cambridge). 



Rushton, W., The Development of 'Sanio's Bar 's' in Pinus 

 Inops. (Ann. Bot. XXX. p. 419—425. 4 textfigs. 1916) 



The author opens his paper with a historical account of our 

 knowledge of the 'Bars of Sanio'. So many varying opinions have 

 been held as to the origin of these structures, that he feit it desi- 

 rable to reinvestigate their development, Material of about 25 spe- 

 cies of Pimis was coUected for the purpose and Pinus Inops was 

 chosen from among them, as showing the most frequent bars. Inte- 

 resting results were obtained from serial, microtomecut, tangential 

 sections, tracing the bars outward from the xylem through the 

 cambium into the phloem.. In the X5iem region they are lignified, 

 whilst in the phloem and cambium they are of cellulose. The bars 



Botan. Centralblatt. Band 134. 1917 26 



