NOTES AND COMMENT 



In August, 1911, The Plant World sent a circular letter to a number 

 of botanists asking them to state what they considered to be the one 

 or two most important contributions to botanical science published 

 within the preceding year or two. The letter stated that the replies 

 would be published, but that the names of those who answered would 

 not be used in connection with their replies. The list of men interrogated 

 included both foreign and American names, selected with a view to 

 representing every shade of botanical interest and activity. Each 

 person was left free to mention a single journal article or an extended 

 text-book, to choose a contribution that was brief and novel or one that 

 was extended and compilatory. 



We realise fully the many considerations which have hiade it difficult 

 for our correspondents to give an answer for the entire science, now so 

 highly specialised, and an answer that would seem just as satisfying 

 several years hence as it may seem at the present time. Our question 

 was broached with the feeling that considerable interest might attach 

 to the collective replies of a large number of men living in widely scat- 

 tered localities and pursuing a diversity of interests. Following are 

 the works which have been mentioned; each of them once only unless 

 otherwise indicated by the figures in parentheses which follow. 



Winkler, work on Graft Hybrids (6). 



Winkler, H. Uber die Nachkommenschaft der Sclanum-Propfbastarde 

 und die Chromosomenzahlen ihrer Keimzellen. Zeitschr. f . Bot. 2 : 

 1-38, 1909. Winkler, H. Uber das Wesen der Propfbastarde. Ber. 

 d. Deut. Bot. Gesell. 28: 116-118, 1910. 



Smith, work on Crown Gall (5). 



Smith, Erwin F. Crown Gall of Plants: Its Cause and Remedy. Bur. 

 Plant Ind. Bull. 213, 1911. 



Johannsen, work in Genetics (2). 



Johannsen, W. Elemente der exacten Erblichkeitslehre, 1909. L 



Coulter and Chamberlain, work on morphology of the Gymnosperms (2). 



Coulter, John M. and Chamberlain, Charles J., Morphology of Gymno- 

 sperms, 1910. 



1 Two of the works mentioned were published more than two years ago, but 

 they have not been discarded. 



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