PREFACE. 



THE present translation of Dr. E. Warming's Haandbog i den 

 Systematiske Botanik is taken from the text of the 3rd Danish 

 Edition (1892), and from Dr. Knoblauch's German Edition (1890), 

 and the book has been further enriched by numerous additional 

 notes which have been kindly sent to me by the author. Dr. 

 Warming's work has long been recognised as an original and 

 important contribution to Systematic Botanical Literature, and I 

 have only to regret that the pressure of other scientific duties 

 has delayed its presentation to English readers. Dr. Warming 

 desires me to record his high appreciation of the careful transla- 

 tion of Dr. Knoblauch, and his obligation to him for a number of 

 corrections and improvements of which he has made use in the 3rd 

 Danish Edition. In a few instances I have made slight additions 

 to the text ; these, however, appear as footnotes, or are enclosed 

 in square brackets. 



In the present Edition the Thallophytes have been revised and 

 rearranged from notes supplied to me by Dr. Knoblauch, to whom 

 I am indebted for the Classification of the Fungi, according to 

 the more recent investigations of Brefeld. The Bacteria have 

 been revised by Dr. Migula, the Florideae rearranged after Schmitz, 

 and the Taphrinacese after Sadebeck. The main body of the text 

 of the AlgfE and Fungi remains as it was originally written by 

 Dr. Wille and Dr. Rostrup in the Danish Edition, though in many 

 places considerable alterations and additions have been made. 

 For the sake of comparison a tabular key to the Classification 

 adopted in the Danish Edition is given in the Appendix. 



In the Angiosperms I have retained the sequence of orders in 



the Danish original, and have not rearranged them according to 

 w. B. v I 



