^4 THE TRANSVERSE SECTIONS OF PETIOLES OF EUCALYPTS 



Characteristic features: 



Section. — Average size. 



Cortical cavities. — Moderately large, generally few. 



Hard Bast. — Interrupted and thin. 



Wood-curve. — Body elongated, and short horns sharply inturned. 



Vessels. — Moderately large, numerous, and regularly distributed. 



2. E. cornuta, Labillardiere ; the ordinary Yate. 



Tree. — Of moderate size. 



Leaves. — Of thick consistence, and nearly equally green on both sides. 



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



thick. 

 Outline of Section. — Oval, and somewhat irregular, flattened on upper surface. 

 Epidermis. — Thickness, ^ — gi^ in. 



Breadth, ^^ in. 

 Cortical Cavities. — i- in. oval, numbering from 9 to 3. 

 Crystals. — Moderately numerous. 



Hard Bast. — Pretty generally continuous, and several cells thick. 

 Wood-curves (see Fig. 12). — Body slightly thickened at the centre, and short 



horns gently or somewhat sharjjly incurved. 

 Vessels. — Largest, -^^ in. 



Average, about half that. 



Somewhat large, and most numerous towards upper portion of wood. 

 Characteristic features : 



Section. — Relatively small. 



Cortical Cavities. — Large, numerous, often quite close together, and almost 



occupying breadth of cortex. 

 Hard Bast. — Continuous and thick. 

 Wood-curve. — Horns sharply incurved, and one or both often separated 



from body-curves. 

 Vessels. — Moderately large, and aggregated towards middle and upper sur- 

 face of wood. 



3. E. cornuta, var lehmanni, Preiss. 



Tree.— Of moderate size. 



Leaves. — Of thick consistence, and equally green on both sides. 

 Size of Section. — About 1 line broad by J line thick, or twice as broad as thick. 

 Outline of Section. — An irregular oval, elongated laterally. 

 Epidermis. — Thickness, ^^ — T^i^- - 



Breadth, ^„ in. 



