DD. Flowers small, yellowish green; leaves 

 6 to 10 inches long. 



(M. acuminata) CUCUMBER TREK 

 CC. Leaves in whorls on ends of branchlets. 



D. Bases of leaves tapering; calyx turned 

 back. 



(M. tripetala) UMBRELLA TREE 

 DD. Bases of leaves broadened into ear- 

 like lobes; calyx not turned back. 



(M. Fraseri) MOUNTAIN MAGNOLIA 



A A. Leaves cut off square at apex; seeds dry, in winged 

 samaras. 



2. Genus LIRIODENDRON, Linn. 



(L. TuUpiferd) TULIP TREE 



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