462 Pteridophyten. — Floristik, Geographie, Systematik, etc. 



such as the evolution of the Filicinean leaf-trace, the ontogeny of 

 the vascular System of the stem and to a comparison of the vascular 

 System of the Ferns with that of other phyla of vascular plants. 



It is shewn that in the course of evolution the leaf-trace leads 

 and the stem stele follows. The protostele is accepted as the most 

 primitive type of vascular System, subsequent evolution depending 

 first upon the actual size of the leaf-traces in relation to that of the 

 stem Stele and secondly upon the ancestral construction of the stele 

 itself. A Short account is given of the "polystely" in the SelagmeUas 

 and it is contrasted with that in the Ferns. A very useful glossary 

 is appended to the lectures defining the most important new terms 

 that have been recently introduced. D. T. Gwynne-Vaughan. 



Wigglesworth, G., The young Sporophytes of Lycopodiuni 

 complanatuni and Lycopodiurn clavatum. (Ann. of Bot. XXI. 82. 

 p. 211. 1907.) 



The first functional root which arises endogenously may shew 

 monarch, diarch and triarch xylem Strands in different regions. The 

 second and following roots are diarch except in fine ramifications 

 where they are monarch. In the young plant of L. complanatuni 

 above the level of the first root contains 3 or 4 radially arranged 

 peripheral Strands of xylem and a central mass of metaxylem Cle- 

 ments which is usually connected up with one or more of the 

 peripheral Strands or may be free. Some of the metaxylem Clements 

 are scalariform, others have rounded or oval pets in several rows. 



The apex of the stem is occupied by several large actively 

 dividing cells. In L. complanatuni short vascular Strand passes from 

 the main stele of the stem into the foot, but not in L. clavatum.. 

 The first leaves which are arranged in an irregulär Spiral are 

 scale-like and without vascular tissue. Even where leaf traces do 

 occur no definite sieve-tubes could be made out in them. 



D. T. Gwynne-Vaughan. 



Anonymus. Einige interessante F/a/s-Arten des tropischen 

 Afrikas. (Notizbl. kgl. bot. Garten und Museum zu Berlin. N*^. 42. 

 p. 62—64. Mit 3 Tafeln. 1908.) 



Abbildungen und kurze Beschreibungen nebst Angaben über 

 Verbreitung, Verwendung etc. von Ficus Vogelii Miq., F. rocco 

 Warb, et Schweinf. und F. triangularis Warb, als dreier besonders 

 häufiger Typen einer Gattung, deren afrikanische Arten in ver- 

 schiedener Hinsicht Beachtung verdienen. 



W. Wangerin (Burg bei Magdeburg). 



Anonymus. In den kgl. botan. Garten zu Dahlem aus ihrer 

 Heimat eingeführte Pflanzen, welche noch nicht im Han- 

 del sind. (Notizbl. kgl. bot. Garten und Museum zu Berlin. N^. 38. 

 p. 253-262. 1906.) 



Aus der Zahl der bis dahin nicht in Kultur befindlichen, in den 

 kgl. botanischen Garten zu Dahlem bei Berlin aus ihrer Heimat 

 eingeführten Pflanzen, werden, unter Zufügung von kurzen Be- 

 schreibungen, Angaben über die Kultur etc. diejenigen aufgeführt, 

 welche sich gut entwickeln oder ein ganz besonderes Interesse be- 

 anspruchen. Die vorliegende Liste enthält Einführungen von den 



