34 THE TEANSVEESE SECTIONS OF PETIOLES OF EUCALYPTS 



Epidermis. — Thickness, ^ — ^^ in. 



Breadth, 4 in. 

 Cortical Cavities. — Largest, j^jin., oval to round, numbering from 8 to 0. 

 Central Canals. — Normally 2, oval and round ; largest about the same size as 



cortical cavity. 

 Crystals. — Moderately numerous . 

 Hard Bast. — Very poorly developed, just represented at intervals by a few 



straggling cells. 

 Wood-curve (see Fig. 26). — Usually of equal thickness throughout and slender, 



with very gently incurved horns, each about one-third body-length. 

 Vessels. — Largest, —^ in. 



Average, about jig in. 



Numerous, large (about twice the size of those of maculata), and 

 generally distributed. 

 Characteristic features : 

 Section. — Large. 



Cortical Cavities. — Moderately large, variable in number. 

 Central Canals. — Normally two, and same size as cortical cavities. 

 Hard Bast. — Very poorly developed. 

 Wood-curve. — Of equal thickness throughout, with very gently incurved 



horns. 

 Vessels. — Large, numerous, and generally distributed. 



Eemaeks. — A petiole was noticed showing only one central canal near the base 

 or point of attachment to the stem, but the normal number (two) towards the leaf- 

 blade. Another petiole showed one only in all the sections examined. 



V. — Poem Belonging to South Austealia and Victoria. 



17. E. corynocalyx, F. v. M.; sugary Eucalypt ; sugar gum. 



Tree. — Fmally tall, said to be the largest tree growing in South Australia. 



Leaves. — Shining, somewhat paler beneath. 



Size of Section.— About | hue broad by J line thick, or IJ times broader than 



thick. 

 Outline of Section.— Bound to oval, usually flattened on upper surface. 

 Epidermis. — Thickness, i in. 



Breadth, -L in. 

 Cortical Cavities.- glo in., round or shghtly oval, numbering from 4 to 13. 



