498 Anatomie. 



Furche normal ist^ finden sich unter dem tiefsten Punkt der 

 tieferen Furchen einige plattgedrückte Zelllagen des Wasserge- 

 webes, die eine Rinne bilden. Die Membran ist meist verbogen. 

 Verf. beschreibt diese Bildung bei Biotia macropliylla, Achillea 

 grandiflora, Doroniciim cordatum, D. Pardalianches, Senecio 

 alpiniis, Serratiila radiata. Er vergleicht die Bildungen, er- 

 klärt sie durch den Druck der Epidermis, zitirt ähnliche Be- 

 obachtungen von de Bary und Schwendener. Im Anhang 

 beschreibt Verf. Gewebequetschungen bei Phlomis tuberosa, 

 Salvla officinalis. Freund (Halle a. S.). 



Gwynne-Vauohan, D. J., On the Anatomy of Archangiopteris 

 Henryi and o t h e r Marattiaceae. (Annals of Botany. Vol. 

 XIX. No. 74. p. 259. 1905.) 



Contains a number of observations upon the stem and 

 petiole of this Fern. The vascular System of the stem consists 

 of a Single ring of small meristeles with a small internal Strand 

 which moves across the central parenchyma to fuse with those 

 steles of the ring that form the margin of the leaf-gap at the 

 point of departure of each leaf-trace. The vascular System of 

 the petiole consists of a number of Strands arranged in a hor- 

 seshoe-shaped curve with the concavity adaxial. In' the basal 

 pulvinus two additional internal Strands arise from the adaxial 

 sides of the dorsal Strands of the curve, and running upwards 

 pass over to fuse with the terminal adaxial Strands of the curve. 



Internal Strands of similar origin also occur in the petiole 

 of Kaulfiissla, Marattla and Anglopterls. In Kaulfussia, as in 

 Archangiopteris, they are confined to the basal pulvinus. In 

 Marattia and Angiopteris they are continued far up into the 

 rachis. The Strands of the curve are strictly comparable to 

 the curved leaf-trace of the Polypodiaceae and Cyatheaceae, 

 but there is nothing in the leaf-traces of these Orders that 

 corresponds to the internal Strands of the Marattiaceae. 



Dormant buds occur at the bottom of small pits at the 

 margins of the stipules of Archangiopteris and Kaulfussia. 

 In Arcliangiopteris, as in the other Marattiaceae, the po- 

 sition of the protophloem is anomalous; for it lies between the 

 xylem and the metaphloem in all the vascular Strands of both 

 stem and leaf. 



The paper concludes with a short description of the sorus 

 and sporangia by Professor Bower, who regards the extension 

 of the sorus as a secondary condition of relatively late oc- 

 currence. D. J. Gwynne-Vaughan. 



TUNMANN, Otto, lieber die Harzgänge von Ginkgo biloba. 

 (Zeitschrift des allgem. österr. Apothekervereins. jhrg. 43. 

 Wien 1905. No. 29 p. 701—704 und No. 30 p. 725—727.) 



Resultate: 1. Es findet eine schizogene Anlage der Harz- 

 gänge statt, die Weiterbildung erfolgt lysigen, so dass typische 



