Band 117. Nr. 12. XXXII. Jahrgang. II. Bd. Nr. 12. 



Botanisches Centralblatt 



Referirendes Organ 



der 



Association Internationale des Kotau istes 

 für das Gesamtgebiet der Botanik. 



Herausgegeben unter der Leitung 

 des Präsidenten: des Vice- Präsidenten : des Secretärs: 



Prof. Dr. E. Warming. Prof. Dr. F. W. Oliver. Dr. J. P. Lotsy. 



und der Redactions-Commissions- Mitglieder : 



Prof. Dr. Wm. Trelease, Dr. R. Pampanini, Prof. Dr. F. W. Oliver, 

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



von zahlreichen Specialredacteuren in den verschiedenen Ländern 



Dr. J. P. Lotsy, Chefredacteur. 



No. 38. 



Abonnement für das halbe Jahr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1911. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 Redaction des Botanischen Centralblattes, Haarlem (Holland), Spaarne 17. 



Hemenway, A. F., Studies on the phloem of the dicoty- 

 ledons. I. Phloem of the Juglandaceae. (Botan. Gaz. LI. p. 

 131 — 135. pl. 13. Feb. 1911.) 



Six species of the Juglandaceae have been studied with reference 

 to distribution of the sieve plates, and these are found to occur on 

 the lateral walls as well as end walls. The sieve plates in these two 

 positions have the same structure and seem to function in the same 

 way, judging from the identical appearance of the callus. The 

 lateral plates may relate these amentiferous dicotyledons with the 

 gymnosperms or vascular cryptogams. M. A. Chrysler. 



Sudworth, G. B. and C. D. Meli. Fustic wood: its Substi- 

 tutes and adulterants. (U. S. Dept. Forest Science. Circular 

 184. June 9, 1011.) 



Includes cross-section photograms of the wood of Chlorophora 

 tinctoria, Cotinus Cotinus, Toxylon pomiferum and Xanthoxylum 

 clavaberculis, with differential key. Trelease. 



Billings, F. H., The nutrition of the embryo sac and 

 embryo in certain Labiatae. (Kans. Univ. Science Bull. V. 

 p. 67—83. pls. 11 — 14. Oct. 1909.) 



Of the fifteen species of Labiatae j belonging to fourteen genera, 

 all but Salvia were found to possess what may be called a micro- 



Botan. Centralblatt. Band 117. 1911 19 



