THE TRANSVERSE SECTIONS OF PETIOLES OF EUCALYPTS 



LIST OF FORMS INVESTIGATED, ALPHABETICALLY ARRANGED. 



Thirteen Victorian species (V), out of a total of thirty-eight, recorded in "Key to the System of Victorian Plants," 

 by Baron Ferd. von Mueller. 



II. — Mode of Preparation and Mounting of Sections. 



From the fresh branches not less than five of the most vigorous-looking leaves 

 were selected. They were taken from different parts of the branch, but never from 

 the growing points. The petioles, with a portion of the lamina attached to each to 

 show the direction of growth, were placed in methylated spirit, and after a few days 

 were usually found in good condition for cutting. If still too hard they were boiled 

 in water for a short time. 



The sections were taken from the basal half of the leaf-stalk — from a point 

 nearer to its base than its junction with the blade. Those intended to be sketched 

 by the camera lucida were cut by hand, the thinnest being selected from a large 

 number taken from each petiole, and examined in a mixture of equal parts of 

 glycerine and spirit. 



