IV CONTENTS. 



Vegetation of southwestern South Austraha — Continued. page. 



Vegetation and environment at Tarcoola 89 



Physiography 89 



Rainfall and temperature 90 



Vegetation 91 



Vegetation and environment at Port Augusta 93 



Physiography 93 



Rainfall. . . . ." 94 



Temperature 94 



Vegetation 94 



Sizes and forms of leaves and phyllodia 96 



Vegetation and environment at Quorn 96 



Climate 99 



Vegetation and habitat 100 



Vegetation of the valleys and of Willochra Plain 101 



Vegetation of low hills 105 



Vegetation of the washes 107 



Root-characters 107 



Mallee and the mallee regions 108 



Physical and climatic features 109 



Rainfall and temperature 109 



Vegetation 110 



Morphological aspects of the xerophytic flora of South Austraha Ill 



Leaf-size and leaf-form Ill 



Features of the roots of South Australian plants 114 



Notes on some structural features of perennials 117 



The phyllodia in some species of Acacia 117 



A. aneura and A. Unophylla 118 



Acacia continua 120 



Acacia tarculiensis 122 



Acacia tetragonophylla 123 



Notes on certain other species of the region 124 



Bossia'a walkeii 124 



Casuarina stricta 124 



Dodona^a attenuata and D. lobulata 125 



Some morphological features of the genus Eremophila 126 



Fusanus acuminatus 129 



Gravillea stenobotrya 130 



Hakea multilincata and H. leucoptera 130 



Melaleuca parviflora 131 



Pittosporum phillyricoides 131 



Triodia irritans 132 



Certain reactions and adjustments of the plants of the more arid portions of South 



Australia 133 



Reactions to light 133 



Reactions to temperature 134 



Reactions to a small water-supply 134 



Reactions to the subterranean environment 136 



Bibliography 138 



