613 



some hours ; all the distilled water was collected to deter- 

 mine whether it contained an oil heavier than water, but 

 with negative results. Not sufficient oil distilled to be 



separated, so that this species of .Melaleuca has no com- 

 mercial value in this direction. 



We wish to acknowledge the assistance we have received 

 from the following gentlemen :— Mr. J. H. Maiden, Govern- 

 ment Botanist and Director, Botanic Gardens, Sydney ; 

 Professor A. J. Ewart, Government Botanist, Melbourne; 

 Mr. T. D. Ferguson, Gladstone, Queensland; Mr. P. Hamil- 

 ton, Oakey Creek, Warialda, New South Wales ; and Mr. 

 F. H. Taylor, of the Technological Museum, for cutting 

 sections of the leaves. 



Explanation of Plates, XLI to XLVIII. 

 M. trichostachya. 

 Fig. 1 (Coloured). Transverse section through half the width of 

 a leaf. Four oil glands are fully sectioned, and 

 another towards the extreme right is only just in the 

 plane of the knife's edge; guard cells are seen on both 

 dorsal and ventral surfaces. The central bundle is on 

 the extreme left. The brown patches in the central 

 spongy mesophyll mark the manganese compound 

 present in that tissue. x 124. Stained with hema- 

 toxylin and safranin. 

 „ 2. Transverse section of a leaf cut clear of any oil gland, x 93. 

 „ 3. Transverse section through centre of a leaf, but excluding 

 the edges. The central bundle of the figure denotes 

 the midrib. x 155. 

 „ 4. A magnification through a bundle, showing sclerenchymat- 

 ous cells bounding the phloem (staining black) the 

 xylem succeeding it towards the bottom. On the right 

 top of the section are some cells of the palisade par- 

 enchyma, x 630. 



