28 Botanisches Centralblatt. 



Rendle, A. B. 1917. Maidenia — a new species of Hydrocharideae. 



(Proc. Linn. Soc. London 1916 — 17. p. 4.) 

 Rio, A. del 1917. El agava musgosa. (Bol. Dirrecc. Estud. biol. Mexico. 



IL p. 194-197. 2 1.) 

 Rock, J. F. 1917. Hawaiian trees — a criticism. (Bull. Torrey bot. 



Club. XLIV. p. 545-546.) 

 Rock, J. F. 1917. Revision of the Hawaiian species of the genus 



C}^rtandra, section Cylindrocatyces Hillebr. (Amer. Journ. Bot. IV. 



p. 604—623. 5 f.) 

 Rogers, R. S. 1915. Notes on certain species of Pterostylis. (Proc. r. 



Soc. Victoria. XXVIII. p. 105—111. 3 pl.) 

 Salmon, E. C. 1917. Some plants that might occur in Britain. (Proc. 



Linn. Soc. London. 1916—17. p. 9.) 

 Saxton, W. T. 1917. Oecological note on the district of Manubie, 



Transkei. (Trans, r. Soc. S. Africa VI. p. 37 — 46. 1 pl.) 

 Schlechter, R. 1917. Orchidaceae novae et criticae. (Rep. Spec nov. 



XV. p. 49—59.) 

 Schneider, C. 1917. Arbores fruticesque chinenses novi. I — II. 'Bot. 



Gaz. LXIII. 398-405, 516—523.) 

 Shantz, H. L. 1917. Plant succession on abandoned roads in eastern 



Colorado. (Journ. of Ecol. V. p 19—42. 23 f.) 

 Shreve, F. 1917. The physical control of Vegetation in rain-forest and 



desert mountains. (Plant World. XX. p. 135—141.) 

 Small, J. K. 1917. Botanical exploration in southern Florida in 1916. 



(Journ. New York bot. Gard. XVIII. p. 98—111. 5 pl.) 

 Small, J. K. 1917. The genus Anamonis in Florida. (Torreva. XVI. 



p. 221-224. 1 f.) 

 Smith, J. J. 1917. The Amboina Orchidaceae collected by C. B. Ro- 

 binson. (Philippine Journ. Sc. C. Bot. XII. p. 249—262.) 

 Thellung, A. 1917. Stratiobotanik. (Vierteljahrschr. natf. Ges. Zürich. 



LXVI. p. 327-336.) 

 Urban, I. 1917. Sertum antillanum. IV. (Rep. Spec. nov. XV. p. 98—112.) 

 Vollmann, F. 1917. Neue Beobachtungen über die Phanerogamen- und 



Gefässkryptogamenflora in Bayern. (Ber. bayer. bot. Ges. XVI. p 



22-76.) 

 Vuyck, L. 1917. Flora batava. 388e— 391e Afl. ('s Gravenhage, M 



Nijhoff. 1917. 4°. 20 pl. met tekst.) 

 Wilczek, E. 1917. Contribution ä la connaissance de la flore suisse 



(Bull. Soc. vaudoise. Sc. nat. LI. p. 321 — 335.) 

 Willis, J. C. 1917. The distribution of the plants of the Outlying Is 



land of New Zealand. (Ann. of Bot. XXXI. p. 327—333.) 

 Zimmermann, W. 1917. Neue Beobachtungen an deutschen Orchideen 



(Allg. bot. Zschr. XXIII. p. 6—12. 1 A.) 

 Zimmerman, W. 1917. Ophrys Fuchsii X araneifera. (Ber. baver. bot 



Ges. XVI. p. 860 

 Zäjp, C van 1917. Beiträge zur Kenntnis der Zingiberaceen. (Rec 



Trav. bot. nderland. XIV. p. 127—142. 3 T.) 



XIX. Pflanzenchemie. 



Berczeller, L. 1917. Zur physikalischen Chemie der Zellmembranen. 

 (Biochem. Zschr. LXXXIV. p. 59—75.) 



Berczeller, L. und E. Fodor. 1917. Ueber die Wirkung von oxydie- 

 renden und reduzierenden Substanzen auf die Diastasen. (Biochem. 

 Zehr. LXXXIV. p. 42—50.) 



Berczeller, L. und E. Szegö. 1917. Die Autooxydation der Zuckerarten. 

 (Biochem. Zschr. LXXXIV. p. 1—42.) 



