i5o8] CURRENT LITERATURE 343 



In the ninth chapter Wiesner describes the differences in tone that have often 

 been observed in the green of leaves and connects it with the excess, deficiency, or 



Stahl 



what different grounds. The tenth chapter attempts a physiological analysis of 

 the Lichigenuss, which inevitably is "up in the air." The last chapter shows how 

 the study of light relations by the photometric methods proposed can be of service 

 in plant culture; and how the results of such study may serve as guides to proper 

 planting in all sorts of conditions and locations. A bibliography (4 PP-) and a 

 double index (topics and plant names) complete the book. 



While for bim who wishes to carry on investigations along those lines the various 

 memoirs that have come from Wiesxee's hand are indispensable, this book w,!l 

 better serve one who desires merely a general statement of results and principles. 

 At the same time it must be said that the book contains much that is wholly 

 familiar and commonplace, so that it might have been much condensed to ad^an- 

 tage; but perhaps the picture would not have been so complete. Furthermore, 

 the book is by no means free from doubtful generalizations and generous assump- 

 tions; indeed, it seems that everyone who deals with adaptations must allow tus 

 imagination a rather loose rein. Withal there is in the work an important nucleus 

 of no little value, and even an occasional flight of fancy may be permitted, it ii 



stimulate interest. — C. R. B. 



MINOR NOTICES 



Cryptogamic flora of Brandenburg.3-The second part of ^^^/f ^."^^J';: 



Algae, by Lemmermann, has now appeared. It concludes th^ 0^^^!^^^°'";^^;^ ' 

 includes Nostocaceae, Microchaetaceae, Scytonemataceae, Stigonema acea , 

 Rivulariaceae, and Camptotrichiaceae; and begins the Flagellatae. J. ^ • • 



List of British plants.-DRUCE4 has published a list of 6"^^^ plan^, 

 including the " Spermophytes, Pteridophytes. and Charads," found either as natn^ 

 or growing in a wild state in Britain, Ireland, and the Channel isles, 

 duction contains a protest against the nomina consenmnda o the Vienna g , 

 and these are "deliberately ignored." The Ust is especially for _ working bo 

 nists and members of the exchange clubs." The census of species ^^0^ ^39° 

 native species, 144 alien species now well established, and 940 more or g 



aliens, the total enumeration including 2964 numbers.— J. M. C. 



i ^f cTAorFXT's Trees ana 

 Trees and shrubs.— A preliminary announcement ot saroi.. 



shruls appeared in this journal in X903, and there followed "O-^^^ 

 parts which completed the first volume in i9o5- -^^^ ^^' ^ 



""TI^^,,,,, E.. Kryptogamenflora der Mark Brandenburg Bandj, Hef^J- 



Algen. pp. 129-304. Leipzig: Gebruder Borntraeger. 1907- ^^S 



I u. 2). Afg.so. , ^. Qj^j.. 



'^ Druce, George Claridge, List of British plants, pp. xv + 104- 

 endon Press. 1908. 2S. 6d. ^p- 



sBoT. Gazette 34:388. 1902; 35 = 62. 1903; 36:68- 1903; 37:i55- 

 372. 1905. 



