AS AIDS IN THE DETEBJSIINATION OP SPECIES. ^^ 



Cortical Cavities.— 4 in., oval to round, numbering from 11 to 3. 

 Hard Bast.— Generally in isolated contiguous patches, a few or several cells thick. 

 Wood-curve (see Fig. 13).— Slender elongated body, almost always broken, 

 and with sharply incurved horns. 



Vessels. — Largest, ^^o i^- 



Average about ^ in. 



Small, few, and regularly distributed. 



Characteristic features : 



Size of Section.— Twice as broad as thick. 



Cortical Cavities.— Moderately large and numerous. 



Hard Bast.— Isolated contiguous patches. 



Wood-curve.— Generally broken, with slender body, and sharply incurved 



horns. 

 ^'essels. — Few and small. 



E. obcovdata, Turczaninow ; " Maalok." 



Tall shrub or small tree. 



Leaves.— Thick, broad, blunt, equally green on both sides. 



Size of Section.— About 1 line broad and thick, or as broad as thick. 



Outline of Section.— Round to oval, the greatest diameter sometimes dorso-ventral. 



Epidermis.— Thickness, -g^o — iro ^^• 



Breadth, ^ - 4 , or half the thickness. 

 Cortical Cavities.— 4 in. roundish, numbering from 10 to 6. 



Crystals. — Numerous. 



Hard Bast. -Very feebly developed, often consisting merely of isolated cells at 



distant intervals. 

 Wood-curve (see Fig. 14).— With somewhat thickened body, graceful incurving, 



and moderate-sized horns. 

 Vessels.— Largest, ^ in. 



Average, about half that. 



Small, not very numerous, in radiating lines, and mostly towards upper 



portion of wood. 



Characteristic features : 



Section. — Average size, as broad as thick. 

 Cortical Cavities.— Large, and comparatively numerous. 

 Hard Bast. — Feebly developed. 



Wood-curve.— With thickened body and graceful incurving horns. 

 Vessels.— Comparatively small, not very numerous, and distributed mostly 

 towards upper portion of wood. 



