CONTENTS. 



PAGE 



List of Illustrations v 



Intr oduction 1 i 



i'V^lical environment of the vepetftti"" "^1^2;;^'^ 5 



I ,'6r|neral physiographical conditions 5 



Features of the climate of Australia 8 



t>^ainfall 8 



Evaporation 14 



I?#Iative humidity 15 



Light 16 



^^Temperature 18 



Winds! 20 



I Subterranean environment 20 



1 • i/Temperature, moisture, and aeration conditions of the soOij 23 



1'™--^ deration of the soil-. .rrfrv 24 



L__„JiEen»perature of the soil 26 



—V Certain characteristics of the vegetation of dry regions, ' 31' 



Physical environment of the. vegetation of South Australia 35 



Physical geography '. 35 



(Climate 42 



♦-Temperature J 42 



Rainfall 44 



/ Effective rainfall 47 



(Vegetation and plant habitats in vicinity of Oodnadatta 60 



) Physiography 60 



J Climate 66 



( Rainfall 65 



Temperature 56 



General f eaftures of the flora of South Australia 57 



The northern portion of South Australia 57 



Vegetation of the Lake Eyre basin 68 



Vegetation at Oodnadatta 58 



Vegetation of the plains 59 



-.Vegetation of and about the sandhills 60 



The Copley environment 64 



Physiography 64 



Climate , 66 



Rainfall 66 



Temperature. 67 



Vegetation of the Copley region 67 



Vegfetation of the "alkali" plains 68 



^ Root-habits of plants of the plains 70 



Vegetation of the low hiUs and slopes 73 



Mono-specific communities ■ 74 



Isolated species and mixed communities 76 



Vegetation of the washes 77 



Parasitic phanerogams 79 



""^ Root-habits of plants of the washes • 80 



/ Leaf-forpi and leaf-sizes 80 - 



/ Vegetation cif Si^thwestern South'A'wtralia 81 



' Vegetation ana environment a t^SoH e ^ 81 



Physiography 81 



Climate 83 



HAbitats 84 



Vegetation of the NuUarbor Plain 85 



Vegetation about Ooldea 86 



Transition from the sandhills to the NuUarbor Plain 89 



Leaf-form and leaf-size 89 ' 



in 



