Morphologie und Teratologie. 247 



ihre Blüthe auf ein Sprossglied reduzirt und die Ligula mit der 

 Deckschuppe höher verwachsen ist. Die Frucht- und die Deck- 

 schuppe verwachsen am vollständigsten bei den Taxaceen, 

 Sciadopytieen und Cupressineen, welche] Familien daher als die 

 höchst entwickelten im System der Coniferen zu betrachten 

 sind. Die Cupressineen sind wohl die jüngsten Coniferen. 

 Was die concrete Beweisführung betrifft muss auf das Original 

 verwiesen werden. Nemer (Prag). 



Leavitt, R. G., Revers ionary Stages Experimentally 

 Induced in Drosera intermedia. (Rhodora. Vol. V. 1903. 

 p. 265— 272, -f ig. in text. 



Concludes that the ancestral leaf of the genus Drosera is 

 orbicular and from this premise proceeds to describe certain 

 reveisionary developments which follow injury. The apex of 

 the stem of Drosera intermedia being shorn of its leaves, with 

 the exception of the bud, was put in Sphagnum. The first 

 leaves produced after this were still spatulate though reduced 

 in size, but following these the leaves developed in the orbi- 

 cular form, and the shoot continued to form leaves of this 

 shape. The tentacles also showed reversion to a type charac- 

 teristic of young leaves, which the author regards as more 

 complex than the usual adult form. Concludes that this rever- 

 sion was caused by disturbance of nutritive processes. 



H. M. Richards (New York). 



Rennert, R. J., The Phyllodes of Oxypolis filiformis, a 



Swamp Xerophyte. (Bull. Torrey Bot. Club. Vol. 30. 

 July 1903. p. 403—411. Fig. 1—3, in text.) 



This plant has terete, awl-pointed phyllodes, possessed of 

 numerous diaphragms and these characteristics are seen even in 

 the earliest leaf of the seedling. Finds in these septa conditions 

 dissimilar to those described by Briquet, as they are composed 

 of sclerotic cells. Externally the septa are marked with minute 

 pits, in which are glands, subtended by minute scales. These 

 scales owing to their position, are not to be regarded as vesti- 

 gial leaf structures. Plants when grown in a saturated atmo- 

 sphere or ordinary soil-water showed hydrophytic adaptations 

 of the phyllode, which leads the author to the conclusion that 

 the xerophytic character of the usual plant places it in the class 

 of swamp xerophytes. H. M. Richards (New York). 



Taaimes, TlNE, Die Periodicität morphologischer Er- 

 scheinungen bei den Pflanzen. (Verh. Kon. Akad. 

 v. Wetensch. Amsterdam. Dl. IX. No. 5. 148 pp. Mit 

 1 Tafel.) 



Die Abhandlung fängt an mit einer übersichtlichen Dar- 

 stellung des schon bekannten über die Längenperiode der 



