AS AIDS IN THE DETERMINATION OF SPECIES. 27 



Vessels.— Largest, ^ in. 

 Average, i in. 



Comparatively small, not very numerous, generally distributed m 

 radiating lines, absent from lower portion of wood. 



Characteristic features : 



Section. — Comparatively small. 



Cortical Cavities.- Small, and often few. 



Hard Bast.— Poorly developed; 



Vessels.— Medium-sized, not numerous, distributed in upper portion of 



wood. 



E. gomphocephala, De Candolle ; Tooart. 



A good-sized tree. 



Leaves. — Thick, shining, slightly paler beneath. 



Size of Section. — About | line broad and thick, or of equal breadth and 



thickness. 

 Outline of Section. — From round to oval. 

 Epidermis. — Thickness, ~ — 4 ^"• 



Breadth, —^ in. 

 Cortical Cavities.— 4 in., elongated oval, numbering from 4 to none. 



Crystals. — Very numerous. 



Hard Bast.— Forming a pretty continuous ring, generally several cells thick. 



Wood-curve (see Fig. 17).— Body usually exceedingly thick, with large and 



stout horns, often well curved inward and approachmg each other. 

 Vessels.— Largest, 4 i^i- and several 4 iii- 

 Average, ^ — ^ in. 



Large and comparatively numerous, distributed mostly towards 

 middle and upper surface. 



Characteristic features : 



Section.— Of equal breadth and thickness. 



Cortical Cavities.— Moderately large, but few. 



Hard Bast. — Continuous and thick. 



Wood-curve. — With exceedmgly thickened body, and large and stout horns. 



Vessels.— Large, numerous, and distributed largely in upper half of wood. 



E. megacarpa, F. v. M.; West Australian Blue Gum. 



Tree. — Medium-sized. 



Leaves. — Of pleasant odour, and equally green on both sides. 



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



