Band 138. Nr. 13. XXXIX. Jahrgang. IL Bd. Nr. 13. 



Botanisches Centralblatt. 



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-Contmissions- Mitglieder : 



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



Prof. Dr. 0. Wehmer und Mag. C. Christensen. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 



Dr. J. P. Lotsy, Chefredacteur. 



No. 39. 



Abonnement für das halbe Jahr 15 Mark 



durch alle Buchhandlungen und Postanstalten. 



1918. 



Alle für die Redaction bestimmten Sendungen sind zu richten an: 

 Redaction des Botanischen Centralblattes, Haarlem (Holland), Spaarnety 



.Arber, A., Further Notes on IntrafascicularCambiumin 



Monocotyledons. (Ann. of Bot. XXXII. p. 87—89. 4 text figs. 



1918.) 



These notes are supplementary to a previous paper (A. Arber, 



On the Occurrence of Intrafascicular Cambium in Monocotyledons. 



Ann. of Bot. XXXI. p. 41—45, 1917). Certain new cases are recorded 



and it is shown that intrafascicular cambium is now known from 



Pandanales, Helobiae, Glumiflorae , Principes, Spathiflorae, Farinosae, 



.Liliiflorae, Scitamineae and Microspermae, i. e. from all but two of 



the Cohorts into which Engler divides the Monocotyledons. The 



exceptions are the Triuridales and Synanthae — Cohorts of which 



suitable material is difficult to obtain in England. It is shown 



that it is probable that the list of cases of intrafascicular cambium 



in Monocotyledons may eventually be almost indefinitely extended. 



Agnes Arber (Cambridge). 



Small, J., The Translocation of Latex and the Multiple 

 Razor. (New Phytologist. XV. p. 194— 199. 6 textfigs. 1916.) 



The author points out that the latex in laticiferous vessels is 

 usually, if not always, under a certain amount of pressure, with 

 the result that when the System is disturbed by a leaf being cut 

 off for examination, the condition of the latex in the leaf itself and 

 also in the stem is no longer the same. The pressure causes the 

 latex to exude, chiefly on the cut surface next the stem. It is neces- 

 sary, therefore, if the condition of the latex in dffferent parts 

 of the leaf is to be studied, to have some means of retaining the 

 latex of the leaf in the same condition as before any cutting has 



Botan. Centralblatt. Band 138. 1918 13 



