Band 101. No. 1. ' ' XXVII. Jahrgang^ 



Botanisches Ceiitralblatt. 



Eeterii endes Organ 



der 



Association luternalioiiale des Botanistes 



für das Gesammtgebiet der Botanik 



Herausgegeben unter der Leitung 

 des Präsidenten : des Vice- Präsidenten : des Secretärs : 



Prof. Dr. R. v. Wettstein Prof. Dr. Ch. Fäahault, Dr. J. P. Lotsy. 



und des Redactions-Commissions-Mitglieds: 



Prof. Dr. Wm. Trelease. 



von zahlreichen Specialredacteuren in den verschiedenen Ländern. 

 Dr. J. P. Lotsy, Chefredacteur. 



No. 1. 



Abonnement für das halbe Jahr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1906. 



Alle für die Redactioß bestimmten Sendungen sind zu richten an Herrn 

 Dr. J. P. LOTSY, Chefredacteur, Leiden (Holland), Rijn-en Schiekade I!3. 



Campbell, D. H., Affinities of the genus Equisetum. 

 (Amer. Nat. XXXIX. May 1905. p. 273--285.) 



Evidence is presented for allying the Equisetales with 

 eusporangiate ferns, rather than with lycopods as has been 

 done by Scott and by Jeffrey. It is pointed out that the 

 basal cell of the archegonium is not always lacking in Equi- 

 setum, and may be lacking in Marattia. Similarly the evi- 

 dence from the longitudinal division of the neck-canal cell is 

 regarded as doubtful. Attention is drawn to the dorsiventral 

 habit and apical growth of the gametophyte of Equisetum, in 

 which respect also it resembles Marattia. Jeffrey 's descrip- 

 tion of cladosiphony to the Equisetales is questioned, and the 

 author considers that anatomical evidence does not favor the 

 connecting of the group with either ferns or lycopods. On the 

 whole the author considers that Equisetales and Fiiicales have 

 Sprung from the same stock, and that the former early diver- 

 ged and became distinguished by a preponderant development 

 of the shoot versus the leaf. M. A. Chrysler. 



Hallier, H., Provision al scheme of the natural (phylo- 

 genetic) svstem of flowering plant s. (New Phyto- 

 logist. Vol. IV. No. 7. July 1905. p. 151 — 162.) 



The author gives an outline sketch and enumeration of his 

 System, as published in his numerous works, of which a list 

 is given. The PolycavpUae are regarded as primitive forms, 

 derived immediately from Bennettitaceae or other extinct Cyca- 



Botan. Centialbl. Band 101 IW6. 1 



