Pteridophyten. — Floristik, Geographie, Systematik etc. 655 



gerbstoflfreichen , auf embr3^onaler Stufe stehen gebliebenen Epider- 

 miszellen. Die vorliegende Hypoglasie ist offenbar die Folge einer 

 lokal ungenügenden Ernährung. Ihre braune Färbung bekammen 

 die Interkostalstreifen durch die Einlagerung von Gerbstoffderivaten 

 in die Membranen. Küster. 



Avebury, Lord, On Seeds with special reference to Bri- 

 tish Plauts. (Jour. Roy. Microscop. Soc. Pt. 2, p. 137—166, figs. 

 20-40. 1909.) 



Notes on seeds of Gymnosperms and Monocotyledons, in conti- 

 nuation of former contribution with reference to Dicotyledons (Bot. 

 Cbl. 111. p. 168). There is also a series of general observations on 

 size, form in relation to dispersal, texture of surface, protection and 

 other characters. W. G. Smith. 



Chart dlep, B., Note on XJtricularia emarginata, Benj. (Ann. Bot. 

 XXIII. 90. p. 339—340. 1 pl. 1909.) 



This Mexican species grows freely in a moderately warm tem- 

 perature in Royal Botanic Garden, Edinburgh; it flowers and seeds 

 abundantl5\ Details of cultivation are given, also names of certain 

 micro-crustacea which occur in large numbers with it. After fertili- 

 sation, the inflorescence bends down and ovaries are submerged, 

 the placenta becoming mucilaginous. An oval discoid protocorm 

 bears two subulate outgrowths, between which two water-shoots are 

 formed. These bear linear lateral appendages, and first bladder 

 arises in superaxillary position to first lateral appendage. Further 

 details in later communication. W. G. Smith. 



Clarke, C. B., Illustrations of Cyperaceae. (London, Williams & 

 Norgate. Price 12/6. 1909.) 



The late C. B. Clarke left in manuscript at his death a mono- 

 graph of the natural family Cyperaceae on which he had been enga- 

 ged for about twenty years. Owing to the absence of the necessary 

 funds a complete issue of that manuscript was found to be, for the 

 moment, impracticable. Owing, however, to the fact that Mr. Clarke 

 had been for man}' 3'ears a recognised authority to whom systematists 

 in ever}' country submitted collections of Cyperaceae for examination 

 and Identification, it appeared desirable to render available to taxo- 

 nomic workers generally the diagnoses and descriptions of those 

 genera and species which Mr. Clarke had considered to be previously 

 uncharacterised. These descriptions were accoidingl}' excerpted from 

 the manuscript and issued as a volume (Addilional series: VIII) of 

 the Kew Bulletin of Miscellaneous Information. When the publication 

 of this volume took place it was announced that Mr. Clarke had 

 some 5'ears before his death printed 144 plates of Cyperaceae with 

 explanator}'' text. These plates assist in explaining the views held 

 hy Mr. Clarke with regard to the sj^stematic arrangement of the 

 genera in the famil}^ Cyperaceae and a hope was expressed that the 

 executors of Mr. Clarke might issue the collection as complementary 

 to the volume containing his descriptions of new genera and species 

 and as elucidating the skeleton of his S3'stem of Classification which 

 is appended to these descriptions. This has now been done and the 

 volume under reference has been issued at a nominal price with 

 the object of enabling future students of Cyperaceae to put them- 



