IV CONTENTS. 



Vegetation of southwestern South Australia — Continued. page. 



Vegetation and environment at Tarcoola 89 



Physiography 89 



Rainfall and temperature 90 



Vegetation 91 



Vegetation and environment at fort Augustq 93 



Physiography 93 



— Rainfall 94 



Temperature 94 



Vegetation 94 



"^ Sizes and forms of leaves and phyllodia 96 



Vegetation and environment at Quom 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 



-4" Morphological aspects of the xerophytic flora of South Australia Ill 



Leaf-size and leaf-form 111- 



"""" 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. linophylla 118 



Acacia continua 120 



Acacia tarcuUensis 122 



Acacia tetragonophylla 123 



Notes on certain other species of the region 124 



Bossisea walkeri 124 



Casuarina stricta , 124 



Dodonsa attenuata and D. lobulata 126 



Some morphological features of the genus Eremophila 126 



Fusanus acuminatus. 129 



Gravillea stenobotrya 130 



Hakea multilineata and H. leucoptera 130 



Melaleuca parviflora 131 



Pittosponun phillyrseoides 131 



Tiiodia irritans 132 



-4 Certain reactions and adjustments of the plants of the more arid portions of South 



AustraUa 133 



s^eactions to hght 133 



s^Reactions to temperatiu"e 134 



■-Reactions to a small water-supply 134 



Reactions to the subterranean environment 136 



Bibliography °. 138 



