Anatomie. 579 



regarded as transitional between a solid protostele and a soleno- 

 stele. Davallia pinnata, in which the ground tissue, although 

 decurrent through the leaf-gap, nevertheless ends blindly in 

 the internode below, and Davallia aculeata, in which the 

 ground tissue within the stele is continuous through out the 

 stem, but is at the same time situated excentrically near the 

 surface upon which the leaves are inserted, are discribed as 

 intermediate types. The objection that this series is a descen- 

 ding and not an ascending one is considered and several ad- 

 mittedly reduced types are described and contrasted with the 

 Davallias in question. 



In the section deaUng with the histology of the vascular 

 System it appears that whenever definite protoxylem Strands of 

 annular and spiral Clements occur in the stems of the Ferns 

 examined they are either endarch or mesarch and they may 

 be traced up into the protoxylems of the leaf-trace. On the 

 other band, if no such definite protoxylem Strands are present 

 the developement of the xylem in the stem is either irregulär 

 or centripetal from a more or less continuous peripheral pro- 

 toxylem of small scalariform Clements. Sections are also given 

 to the vascular anatomy of the petiole and of the lateral shoot. 

 Finally the systematic value of the vascular anatomy is dis- 

 cussed and the results obtained tentatively applied to the Classi- 

 fication of the Polypodlaceae, from which it appears that 

 the System proposed by Prantl in 1892 receives considerable, 

 although qualified, support. D. T. Gwynne-Vaughan. 



Lagerheim, G., Nägra nya korkreagens. (Separat-Abdruck 

 aus Svensk Farmaceutisk Tidskrift No. 20, 3 pp. 1902.) 



Zur Tinction verkorkter und kutikularisirter Zellmembranen 

 werden empfohlen „blaue Fettfarbe in Petroleumbenzin lösli9h" 

 von E. Merck (alkoholische Lösung), Buttergelb (alkoholische 

 Lösung), Dimetylamidoazobenzol (alkoholische Lösung) und 

 Scharlach R. (gelöst in heisser Milchsäure); das letzte Reagens 

 eignet sich vorzüglich zur Färbung von getrocknetem Material. 



Grevillius (Kempen a. Rh.). 



MÜLLER, Rudolf, Ueber die vermeintlichen Oxalat- 

 k ristalle in Safran. (Zeitschrift des allgemeinen öster- 

 reichischen Apotheker - Vereines. No, 29. Jahrgang LXL 

 Juli 1903. 8'\ p. 823—826.) 



Im Gegensatz zu J. Moeller, Arth. Meyer, A. E. Vogl, 

 A. Tschirch und O. Oesterle findet Verf. in Safrannarben keinen 

 Oxalsäuren Kallt. Die chemische Natur der auf Zusatz von Schwefel- 

 säure auftretenden „Kristallnädelchen" konnte nicht ermittelt werden, 

 Sollten dieselben aus Ca SO* bestehen, so müsste angenommen werden, 

 dass das Calcium nicht an Oxalsäure gebunden ist, sondern in Form eines 

 -anderen in Salzsäure unlöslichen Salzes enthalten ist. 



Matouschek (Reichenberg). 



37* 



