ARID PORTIONS OF SOUTH AUSTRALIA. 6 



writer's previous experiences in the dry portions of North America, in 

 southern Algeria, and in portions of Egypt, and these experiences 

 have been of incalculable assistance in attempts at interpreting the 

 various features of Australian plant life observed. 



It is impossible adequately to acknowledge the very many kind- 

 nesses shown the writer while in Australia. A friendly and helpful 

 spirit of assistance and cooperation was shown by a large number and 

 on very many occasions; but especial acknowledgment must be given 

 Professor and Mrs. T. G. B. Osborn, of the University of Adelaide, who 

 helped greatly to make the visit pleasant as well as profitable. Dr. 

 and Mrs. R. S. Rogers, of Adelaide, well known for their studies on 

 the Orchidacese, acted as guides on several botanical excursions into the 

 Mount Lofty Ranges, and in other ways were helpful. J. M. Black 

 esq., of Adelaide, an authority on South Australian plants, very 

 kindly determined those plants which were collected by the writer. 

 Among them Mr. Black found some new stations and a species of 

 Kochia collected at Copley which was previously undescribed. Men- 

 tion should also be made of the assistance of Alfred Cocks esq., of 

 Adelaide, the former proprietor of "Wilgena" station, near which 

 Tarcoola is situated, whose acquaintance with the "back blocks" of 

 the state is very extensive. Thomas Gill esq., of Adelaide, was of as- 

 sistance in procuring for the writer useful works on Australian explora- 

 tion and in other ways; C. S. Owen-Smith esq., of Adelaide, was also 

 helpful in various ways; and finally, not to mention others, G. A. 

 Hobler esq., and Capt. E. W. Saunders, of the Commonwealth rail- 

 ways, kindly placed conveniences at the writer's disposal at Ooldea, 

 and were of much assistance in other ways and at other times. 



Especial acknowledgment must be made of permission to use figures, 

 tables, or data for the presentation of many characteristics of the 

 physical environment of the South Australian plants. Figure 1 is 

 from Australia, 1916, by Professor J. W. Gregory; figure 10 is an 

 adaptation of a figure in the Geography of South Australia, 1909, by 

 Howchin and Gregory. Those noted as being from Hunt are by H. A. 

 Hunt esq., Commonwealth meteorologist, and have been taken from 

 various publications of the Commonwealth Bureau of Meteorology. 

 The figures from Taylor are by Dr. Griffith Taylor, physiographer, 

 Commonwealth Meteorological Office, and are in part from publications 

 of the bureau and in part from other publications as noted. As a 

 whole the figures were prepared to serve other than botanical ends 

 and in most of them some changes have been made, inconsiderable in 

 certain instances, to suit the needs of the present study. Figure 11 

 is based on data supplied by the Adelaide office of the Commonwealth 

 Bureau of Meteorology. In the main the climatological data were 

 supplied by the Commonwealth Bureau or were derived from its pub- 

 lications, and in either case acknowledgment is made explicitly in the 

 course of the study. 



