vi. PREFACE. 
The determination of the systematic position of a plant is often difficult 
and at times impossible without the aid of matured fruits. 
The specific characters are in most cases comparative only as regards 
South Australian species. 
The definitions of the generic and specific names will it is thought be of 
some aid in associating the name with a botanical character, though not 
always happily selected. 
It will always afford me pleasure to assist any correspondent with his 
difficulties, and to receive authentic specimens of species unrecorded for a 
district. 
Students using this book are recommended to insert in their proper 
places the corrections, &c., p. 301-3. 
My thanks are due to the Hon. the Minister of Education, under whose 
departmental auspices this volume has been published; and to a colleague 
for revising parts III. and IV. 
University of Adelaide, 
October, 1889. 
