Bd. XCIX. No. U. XXVI. Jahrgang. 



Botanisches Ceiitralblatt. 



Referirendes Organ 



der 



Association liiterii<ationale 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. Flahault„ 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. 40. 



Abonnement für das halbe Jahr 14 Mark 



durch alle Buchhandlungen und Postanstalten. 



1905. 



Alle für die Redaction bestimmten Sendungen sind zu richten an Herrn 

 Dr. J. P. LOTSY, Chefredacteur, Leiden (Holland), Rijn-en Schiekade 113. 



Chrysler, Mintin Ashbl'RV, Thedevelopment ofthe central 

 cv linder of Lillaceae and Araceae. (Botanical Gazette. 

 September 1904. p. 161 — 184.) 



The writer concludes from his studies o\ development, 

 that the central cylinder in the Liliaceae and Araceae was pri- 

 mitively collateral and tubulär and that the pith is in the same 

 morphoiogical category as the cortex, Further the primitive 

 condition passes into one in which the bundles begin to assume 

 a meduilary course.. The amphivasa! concentric Strands are 

 not a primitive feature since they do not occur in the young 

 seedling or in the leaf or in the reproductive axis. The Mono- 

 cotyledons on anatomical grounds appear to have been derived 

 from dicotyledonous ancestors. E. C. Jeffrey. 



Coulter, John, M., ThePhylogeny of Angiosperms. (De- 

 cennial Pubiications of the University of Chicago. X. April, 

 1903. p. 191 — 194.) 



The Angiosperms constitute at least two separate lines, the 

 Monocotyledons and the Dicotyledons, which by no means re- 

 present a Single phylum. No angiospermous phylum has been 

 derived from the Gymnosperms or from the living heterosporous 

 Pteridophyta. The various phyla of Angiosperms have indepen- 

 dantly arisen from the ancient eusporangiate Filicales, wich also 

 gave rise to the Gymnosperms and several of these phyla pro- 

 bably arose from the Marattiaceous plexus of the Palaeozoic. 

 If the Angiosperms are monophyletic, which appears impro- 



Botan. Centralbl. Bd. XCIX. 1905 22 



