AS AIDS IN THE DETEEMINATION OF SPECIES. 29 



Characteristic features : 

 Section. — Very large. 

 Epidermis. —Very thick. 

 Cortical Cavities. — Moderately large and few. 

 Hard Bast. — Continuous, and usually several cells thick. 

 Vessels. — Large, numerous, and regularly distributed. 



10. E. rndis, Endhcher ; flooded or sv^^amp Gum of Western Australia. 

 Tree. — Usually not very tall. 

 Leaves. — Generally thin, and equally green on both sides. 



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



thick. 



Outline of Section. — lioundish, and flattened on top. 

 Epidermis. — Thickness, ~ in. 



Breadth, ~ in., or about half the thickness. 

 Cortical Cavities. — ~ in., roundish, numbering from 9 to 2. 

 Crystals. — Few. 



Hard Bast. — Very poorly developed, often just represented by straggling cells. 

 Wood-curve (see Fig. 20). — Elongated, and with short or medium-sized horns. 

 Vessels. — Largest, ^ in. 

 Average, 4^ in. 

 Comparatively small, moderately numerous, and mostly distributed about 

 middle. 



Characteristic features : 

 Section. — Small. 

 Cortical Cavities. — Small. 

 Hard Bast. — Very poorly developed. 

 Wood-curve. — With body elongated and short horns. 

 Vessels. — Small, and mainly distributed in middle of wood. 



IL E.pachypoda, F. v. M. 



Shrub. 



Leaves. — Equally green and pale on both sides. 



Size of Section.- About 1 line broad and thick, or equally broad and thick. 



Outline of Section. — Eound, sometimes slightly elongated. 



Epidermis. — Thickness, g^hi.; oval, numbering from 4 to 2, 



Breadth, about ~ in. 

 Cortical Cavities. — ^^ in. 

 Crystals. — Few. 



