AS AIDS IN THE DETERMINATION OF SPECIES. 33 



Characteristic features : 



Section. — Large, as broad as thick. 



Cortical Cavities.— Moderately large, and numerous. 



Hard Bast. — Well-developed, and generally continuous. 



Wood-curve. — With thickened body and gently incurved short horns. 



Vessels.— Medium- sized, principally distributed in middle tract of wood. 



III. — Form Confined to New South Wales. 



15. E. punctata, De Candolle ; leather-jacket. 

 Tree. — Attaining a height of 100ft. or more. 

 Leaves. — Paler beneath. 



Size of Section.— About J line broad and thick, or as broad as thick. 

 Outline of Section.— Round, with slight flatteniBg on upper surface. 

 Epidermis.— Thickness, -^ — 4 i^^- 



Breadth, about -^^ in. 

 Cortical Cavities.— jig in., elongated oval, numbering from 8 to 1. 

 Crystals. — Very few. 

 Hard Bast. — Very sparsely developed. 

 Wood-curve (see Fig. 25).— Nearly always found entire; body thickened, and 



horns very gently incurved and short. 

 Vessels.— Largest, ^ in. 

 Average, g^ in. 



Relatively few, small and scattered. 

 Characteristic features : 



Section. — Small, as broad as thick. 



Cortical Cavities.— Moderately large. 



Hard Bast. — Very poorly developed. 



Wood-curve.— Nearly always found entire, with thickened body and short 



horns. 

 Vessels. — Few, small, and scattered. 



IV. — Forms Confined to Queensland. 



16. E. maculata, var. citriodora, Hooker ; lemon-scented Eucalypt. 

 Tree. — Only differing from maculata in the lemon-scented foliage. 

 Size of Section.— 1^ line broad by 1 line thick, or 1^ times broader than thick. 

 Outhne of Section.— Oval, somewhat irregular in oxitline, and flattened or 

 depressed on top. 



