BY MARJORIE I. COLLINS. 391 



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 hood of Adelaide, South Australia. Report Brit. Ass. Adv. Sci., 1914, pp. 

 584-586. 



OsTENFELD, C. H., 1918.— Contributions to West Australian Botany. Part 2. 

 Dansk Botanisk Arkiv., Bd. ii., Nr. 8, pp. 1-12. 



Paulsen, Ove, 1918. — Chenopodiaceae from West Australia. Dansk Botatmk 

 Arkiv., Bd. ii., Nr. 8, pp. 56-66. 



SAI.ISBURY, E. J., 1920.— A Draft Scheme for the Representation of British 

 Vegetation in Black and Wiiite. Journ. EcoL, viii., No. 1, 1920. 



ScillMPER, A. F. W., 1903.— Plant Geography upon a Physiological Basis. 

 English Translation, Oxford, 1903, pp. 395-410. 



SOLEREDER, 1908. — Systematic Anatomy of the Dicotyledons, vol. i. English 

 Translation, Oxford. 



Tansley, a. G., 1911.— Types of British Vegetation. Cambridge. 



Tansley, a. G., 1920.— The Classification of Vegetation and the Concept of 

 Development. Journ. Ecol., viii., No. 2. 



Warming, E., 1909.— The Oecology of Plants. Oxford. 



Yapp, R. H., Johns, D., and Joxes, O. T., 1917.— The Salt Marshes of the 

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explanation of plates XXVI.-XXXII 



For the photographs illustrating this paper the writer has to thank Mr. A. 

 Musgrave, Entomologist, Australian Museum, and Mr. D. A. Pritchard. B.Sc. 

 Text-figures 2 to 5 were prepared by Miss Bennett, Teachers' College. Sydney. 



Plate xxvi. 



Photo 1. Mangrove formation (Az'irenma) at high tide. Middle Harbour, Port 

 Jackson. 

 „ 3. Close view of Avicennia officinalis showing pneumatophores. Middle 

 Harbour, Port Jackson. 



Plate xxvii. 



Photo 2. Interior of Mangrove formation at Port Hacking, showing distorted 

 branches of Avicennia officinalis and pneumatophores. 

 4. Cabbage Tree Creek. Port Hacking showing extensive development of 

 Aegiceras majus on inner limits of Mangrove formation. Ground 

 vegetation of Salicornia and Satnolus beneath mangrove. 



Plate xxviii. 



Photo 5. Aegiceras majus Port Hacking. Pneumatophores have arisen from a 

 neighbouring Avicennia. 



6. Aegiceras 7najus with cluster of viviparous fruits. 



7. Junction of Sporobolus-Cynodon Associes and Salicornia-Savwhis 



Associes within Salicornietum at Middle Harbour, Port Jackson. 

 Note: Samolus replaces Spergularia in this region as co-dominant with 

 Salicornia. 



