140 president's address. — section d. 



A series of papers by Mc Alpine, the late Dr. Rothera, and my- 

 self, on Bitter Pit, have led to a divergence of views rather than ix> 

 hanncmy, and we owe notes on Teratology to A. D. Hardy and E. 

 Archer. 



In regard to flowering plants we have, in addition to Maiden's 

 extended investigations of eucalyptus and acacia, much economic 

 work from R. T. Baker and H. G. Smith, Prof. Osborn, Dawkins 

 and Earl, Challinor, Cheei and Penfold, Dr. Heber Green, P. R. 

 H. St. John, E. Breakwell. and Dr. F. Steward, and an investi- 

 gation by Dr. Petrie into poisonous Solanaceaee, and the occur- 

 rence of hydrocyanic acid in plants. 



Economic work on timber and timber trees has been carried out 

 by R. T. Patten, and also by J. Nangle. 



More purely systematic work is represented by Williamson's 

 revision of the genus Pultenaea, and by various papers by R. H. 

 Cambage, A. G. Hamilton, W. F. Blakeley, I. Cookeon, C. Hall, 

 R. A. Black, E. C. Andrews, E. Cheel, C. T. White, J. M. Black, 

 by Dr. Rogers on Orchids, and by the late Dr. A. Morrison on the 

 Flora of Western Australia and of the Northern Territory, by 

 L. Rod way on the Tasmanian flora, and by several of the authoi^s 

 already mentioned, including the chief source of origin, J. H. 

 Maiden. 



Work on ecology has been carried oai by A. G. Hamilton, F. E. 

 Haviland, A. A. Hamilton, Prof. Osborn, R. H. Cambage, J. 

 Shirley, C. A. Lambert, and O. H. Sargent; on anatomy bv 

 M. I. Collins, R. T. Baker, J. Shirley, and C. A. Lambert, and 

 on morbid anatomy (tumours of eucalyts) by J. J. Fletcher and 

 C. T. Musson. The fact established by J. H. Herbert that the tree 

 Nuytsia, belonging to the Mistletoe family, is a root parasite, gives 

 us an insight into' the probable origin of this group of parasitic 

 flowering plants. 



Although interesting accounts of hybrids in eucalypts have been 

 published by Mr. Maiden, and of hybridism in Grevilhd by J. J. 

 Fletcher, there is little tO' record in regard to scientific plant breed- 

 ing, for although a great deal of such work is done at different 

 agricultural stations, scientific accounts of it are rarely published, 

 and the economic aspect of the work done is only too often allowed 

 to suppress completely the scientific side of the work, to the die- 

 advantage of both. 



Work on Palaeobotany is i-epresented by A. B. Walkom on the 

 Jurassic Plants of Lismore, and by several of Mr. Chapman's 

 numerous papers 



In regard to plant physiology, there are comparatively few papers 

 to note. Dr. McLennan published soine work on the influence of 

 increased gas pressure cii growth and curvature, and there are two 

 papers by myself which might be mentioned. The first is a com- 

 parative study of exidatioii by katalysts of organic and inorganic 



