﻿CURRENT LITERATURE 



Illustrations— A series of lectures dealing with the illustration of botanical 

 papers was delivered at the University College, London, in igi3, by T. G. Hill. 

 In response to various requests, these lectures are now published in book form. 10 

 The various forms of intaglio, plane surface, and relief printing are described, 

 and their limitations noted. Suggestions are given for the preparation of 

 copy suited to the various types of reproduction . The descriptions of processes 

 are interesting, and, combined with the practical hints, should enable investi- 

 gators to furnish more effective copy. There is no effort to give instruction 

 in drawing. — C. J. Chamberlain. 



North American Flora.— The third part of Vol. 17 continues the presenta- 

 tion of the Poaceae, and includes the genus Panicum by Hitchcock," who 

 recognizes 211 species distributed among 46 tribes. No new species are 

 described, but it is interesting to note that Hitchcock's name is associated with 

 32 of the species. Other diligent students of the species have been Nash (30 

 species), Scribner (25 species), and Ashe (16 species).— J. M. C. 



NOTES FOR STUDENTS 

 Anthocyanins.— Willstatter" and his students have made an extensive 

 study of the anthocyanins of various flowers and fruits. The findings are ce 

 tain to prove of great importance to plant workers, especially breeders ar 

 physiologists. The work puts this previously little understood group of plai 

 pigments among those most thoroughly worked. All such matters :1S met h< <■ 



stitution, general chemical characters, empirical and structural formulae, an 



10 Hill, T. G., The essentials of illustration. 8vo. pp. xii+95. London: Weslt 

 &Son. 1915. 



"North American Flora i 7 :part 3. pp. 197-288. Poales: Poaceae (pars), I 

 G. V. Nash and A. S. Hitchcock. New York Botanical Garden. 1915. 



" Willstatter, R., liber Pflanzenfarbstoffe. Ber. Chem. Gesells. 47:2831-287 

 1915; Willstatter, R., and Nolan, T. J., II. tlber den Farbstoff der Rose. An 



E. H., VI. Uber die Farbstoffe des Weintraube und der Heidelbeere. ibid. 



Willstatter, R., and Martin, K., VII. Uber den Farbstoff der Althaea 

 Kd. 110-112; Willstatter, R., and Mieg, W., VIII. Uber den Farbstoff 

 er Malve, ibid. 122-135; Willstatter, R. ( and Nolan, T. J., IX. Uber den 

 ff die Paonie, ibid. 136-146; Willstatter, R., and Mallison, H., X. Uber 

 nen der Blutenfarben, ibid. 147- 



