and 7\v/if/ J\c\ 



79 



hs. Leaf-scars narrowly lunate, buds nearly 

 globular, numerous scales rounded or 

 obtuse at apex, chestnut brown lustrous, 

 twigs glabrous, usually armed with thorns. 



Grates gus Linn. 



Bud-scales slightly pubescent, inner ones silky 

 tomentose, bundle-scars five, terminal bud about 

 one-half inch long ovate acute, scales three or four 

 visible dark red, leaf-scar narrow lunate, lateral 

 buds small, two scales visible, twig stout red-brown 

 glabrous becoming darker in second year, on 

 branchlets outer papery layer of bark easily separ- 

 able from green layer beneath. 



Pyrus americana (Marsh.) de. C. 



Sassafras -sassafras 



L Leaf-scar magnified. 



