A Bud and Twig Key 25 



. Bundle-scars three. 



/i. No terminal bud, tip-scar distinct; buds two 

 superposed the larger one scarcely one-six- 

 teenth inch long, appressed, nearly hemispher- 

 ical; scales two rarely three visible dark 

 brown, smaller bud nearly hidden between 

 upper one and the rounded triangular leaf- 

 scar, twig brown speckled with gray, glabrous. 

 Ccrcis canadensis Linn. 



/.?. Terminal bud one-eighth to one-fourth inch, 

 more than four scales visible. 



gi. Pith solid with woody transverse plates 

 about one-eighth inch apart visible with 

 hand-lens, terminal bud one-fourth inch long 

 obtuse, scales six or seven visible, dark red- 

 dish slightly pubescent, leaf-scar lunate, 

 twig glabrous or nearly so, light brown be- 

 coming darker the second year. 



Nyssa sylvatica Marsh. 



g2. Pith homogeneous. 



hi. Leaf -scars broadly lunate or semi-orbi- 

 cular, terminal bud acute about one-fourth 

 inch long, scales polished ciliate margin, 

 bundle- scars large annular, pith large in 

 twigs, branchlets often winged after sec- 

 ond year. 



Liquidambar styracifliia Linn. 



]\2. Leaf-scars narrowly lunate, buds nearly 

 globular, numerous scales rounded or 

 obtuse at apex, chestnut brown lustrous, 

 twigs glabrous, usually armed with thorns. 



Cratccgus Linn. 



