97 



only one in this country that has been found upon a cultivated 



plant. 



}ph 



the orchard grass {Dactylis glonieratd) while E, 



# 



nalis) and arnica {^Arnica montana). The leading orders bearing 

 white smuts are: Ranunculacea^, Papaveraceae, Compositae, Bor- 

 aginace^ and Gramine^, and the one upon the spinach, introduces 

 a new^ host-order and one that at present Is surrounded by those 

 not known to contain any species attacked by an Entyloma, 



Byron D. Halsted. 



Rtt'jgkrs College, March 24, 1890. 



The New Edition of Gray's Manual, 



Prof. Porter's criticism of the new edition of Gray's Manual, 

 which was admitted into the last number of the BULLETIN, is 

 written in a spirit so unworthy of him that self-respect on the 

 part of the editors of the Manual would ordinarily forbid a reply. 

 There are some statements, however, which I desire to make in 

 relation to the work, some of which touch more or less closely 

 upon points that Prof Porter has referred to. As for most of the 

 questions propounded by him, so far as I understand their bear- 

 ing, anyone who has taken the trouble to read the preface will 

 need little further answer 



The different editions of the Manual have contained the fol- 

 lowing numbers of pages : the first 782, the second 791, the third 

 746, the fourth 890, the fifth 742, and the sixth 818. The Mosses 

 and Liverworts were included in all the previous editions except- 

 ing the third and fifth, the third and fourth including also the 

 ** Garden Botany/* The Mosses, etc., were dropped from the 

 fifth edition in the expectation that a supplementary volume 

 would be prepared to cover them and perhaps other cryptogams. 

 This hope has been fulfilled only in part by the publication of the 



__ 4 



Manual of Mosses by Lcsquereux and James. 



In the present edition, notwithstanding the extension of 

 the territory, and with the inclusion again of the Hepaticae, 

 with other material which it seemed advisable to add, an effort 

 has been made to avoid an increase in the bulk of the volume. 

 Economy of space has been studied at every point where it was 



