president's address. 875 



By Baron F. von Mueller, K.C.M.G., tfcc, on Dendrohium 

 cincinnahcm, sp. n. 



By Charles Knight, F.R.C.S., F.L.S., Wellington, KZ., on a 

 new Species of Parmelia from Mount Kosciusko, p. 114, pi, XVI. 



By A. J. Dufiield, Esq., Ethnological Notes on New Ireland 

 and its Archipelago, p. 115, pi XVII. 



By L. A. Bernays, Esq., F.L.S., Exotic Fruits new to Queens- 

 land, p. 136. 



By James Pink, Esq., F.R.H.S., A Plea for the Practice of 

 Hybridisation in Plants, p. 161. 



The principal work in Botanical Science, outside the Societies, 

 has been as follows — ^The Eucalyptographia of Baron v. Mueller, 

 of which two volumes are now complete, furnishes descriptions of 

 a hundred well-defined species of Eucalyptus, and though some 

 fifty more remain for investigation, it is not probable that they 

 will present any marked instances of deviation from the types 

 already recoi'ded. Improved, however, as the classification of this 

 extensive and puzzling genus already is, some still more natural 

 system, based on carpologic considerations is regarded by the 

 author as both desirable and within reach. It is evident that the 

 grouping of species according to the shape and opening of the 

 anthers may lead sometimes to very erroneous conclusions. Mr. 

 J. E. Brown, F.L.S., in his splendid work on " the Forest Flora 

 of South Australia " aftbrds two illustrations of this remark. His 

 tig-ure oi Eucalyptus paniculata Smith, is made to represent a small 

 White Gum, of little value, in South Australia, and also the lofty 

 White Ironbark of N.S.W., the toughest and most durable of all 

 Ironbarks. Again, E. leucoxylon, of which three figures are given 

 with white, and one with red flowers, includes a Blue or White 

 Gum of S. Australia and Victoria, as well as our Red-flowered 

 Ironbark, remarkable for the dark colour of its timber and deep 

 corrugations of its bark. This tree is probably Cunningham's 

 E. sideroxylon, and no one who has seen the two trees growing in 

 their native forests can suppose that they are identical, or even 

 nearly allied. It is therefore much to be hoped that Baron von 

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