p 



1907! CURRENT LITERATURE 



399 



Structure of chloroplasts. — The examination of living and fixed chloroplasts 



of Chlorophytum and Selaginella convinces Priestly and Irving^^ that the 

 chlorophyll occupies the peripheral layer, 1-3/* thick, where it is held in the 

 meshes of a network. The observations of Timiriazefp and Nageli on the 

 splitting of the chloroplast when placed in a solution of low osmotic pressure 

 are confirmed. — C. R. B. 



L 



Zymase from Aspergillus, — ^Jtjnitzky^^ finds that the aerobically cultivated 

 mycelium of Aspergillus always contains some zymase. He regards this result 

 as favoring rather than as opposing the theory of the genetic connection of alcohol- 

 fermentation with aerobic respiration. — Raymond H. Pond. 



Carex in N. W. America. — Holmes Ij^s published an account of the genus 

 Carex in northwestern America^ the topics being (i) a synopsis of the species, 

 (2) types characteristic of northwest America, and (3) the geographical distribu- 

 tion of the Carices of northwest America. — ^J. M. C, 



Rate and period of growth of Polyporus. — Edgerton^^ has found that the 

 growth of Polyporus lucidus is exogenous and averages about 0.5^"^ a day for 

 the grow^ing-period; and that the change in the development from stalk to pileus 

 is a gradual process.— J. M. C. 



Julianaceae. — The full paper dealing with this interesting new family of 

 "'"~n plants has now appeared.^^ The preliminary abstract for presentation 



Me ._ 

 before 



J 



Aerenchyroa. — ^Witte^s> describes and figures the aerenchyma in Lysimachia 

 vulgaris produced in stems in w^ater, and records the production of this tissue in 

 seven species of the Swedish flora.— C. R. B. 



Annie 



sidered in relation to its function. Annals of Botany 21:407-413. figs, 2. 1907. 



34 JuNitZKY, N., Ueber Zymase aus Aspergillus niger, Ber. Deutsch. Bot, 

 Gesells. 25:210-212. 1907. 



America^ Beih. Bot. CentralbL 



222:1-29. 1907. 



W. 



Tor- 



reya 7:89-97. 1907. 



37 Hemsley, W. Botting, On the Julianaceae: a new natural order of plants. 



Phil. Trans. Roy. Soc. London B 199:169-197. pis. 18-24. figs- 2j, 1907. 



3^ Box. Gazette 42:236. 1906. 



39 WiTTE, Hernfrid, Ueber das Vorkommen eines aerenchymatis 

 bei Lysimachia vulgaris L. Bot. Studier tillagnade F. J. Kjellman 

 -To. Upsala. 1906. 



Gewebes 



