4. Bundle-scar one, roundish. 



Iiarix (Larches). Leaf -scars minute, terminating persistent leaf- 

 bases which cover the twigs. Twigs with numerous short spurs, often 

 bearing small cones. 



D. Buds covered by the leaf-scar or finally breaking through. 



Robinia Fseudacacia (Common Locust) . Twigs armed with pairs 

 of sharp spines (stipules) . 



11. LEAF-SCARS OPPOSITE OR WHORLED, RARELY 

 ALTERNATE ON VIGOROUS SHOOTS. 



A. Bundle-scars three to nine. 

 1. Buds ovoid, conical or globose. 



Acer (Maples) . Leaf-scars V-shaped, U-shaped, crescentic or ellip- 

 tical. Buds not sticky, mostly small or of medium size. 



iBsculus Hippocastanum (Hobse-Chestnut) . Leaf-scars semi- 

 circular, semioval or triangular, straight or but slightly curved above. 

 Buds sticky, the terminal ones large. 



2. Leaf-buds flattened-pyram/idal. Flower-buds globose or turnip- 

 shaped, pointed. 



Cornus florida (Flowering Dogwood). Leaf-scars crescentic, 

 often much raised on the leaf base. Buds silky, greyish purple. 



B. Bundle-scars numerous, arranged in a nearly setnicircular line. 



Fraxinus (Ashes). Leaf -scars broadly crescentic or semicircular. 

 Buds pyramidal or broadly ovoid, the scales thick and leathery, brownish 

 or black. 



C, Bundle-scars numerous, arranged in a nearly circula/i' line. 



Catalpa (Indian Beans, Cigar Trees). Leaf-scars mostly oval or 

 circular, usually in whorls of three. Buds hemispherical, the scales thin, 

 brownish. Twigs bearing for many months the long cigar-shaped pods 

 which finally split in half lengthwise to release the winged, fringe-tipped 

 seeds. 



