104 DESCRIPTIONS OF THE SHRUBS 



KEY TO THE SHRUBBY MAPLES 



* Leaves compound (pinnate) of usually 3 (3-7) irre,£jularly notched 



blades. Ash-leaved Maple (102) or Box 'Elder' — Acer Ne- 

 gundo. 



* Leaves compound (palmate) of 5-0 narrow, deeply-notched blades. 



Varieties of Japan Maple (105) — Acer palmktum : 

 diss^ctum has green blades. 

 ornMum has deep red blades, 

 rdseo-pictum has green blades marked with white and green 



spots, 

 aureum has yellow blades, 

 sangufneum has bright red blades. 



* Leaves generally 3- (rarely 5-) lobed. (A.) 

 A. Lobes acute at tip and fully notched. (B.) 



B. Leaves lJ-3^ inches long with long terminal lobe. Siberian 

 Maple (106) — Acer Ginn^la. 



B. Leaves 2^-4^ inches long with coarsely serrated lobes. Moun- 

 tain Maple (103) — Acer spic^tum. 



B. Leaves 6-8 inches long, finely serrate ; bark green with white 

 lines; usually a tree. Striped or Goosefoot Maple (104) 

 MoosEwooD — Acer pennsylvanicum. 



A. Lobes all rounded and entire or with blunt teeth ; flower-clus- 

 ters erect. (C.) 



C. Leaves 3-5-lobed, the lobes entire or the middle one slightly 

 3-lobed, dull green in some, varieties variegated with white 

 dots or blotches, 1^-31 inches long ; fruit broadly spreading. 

 Field Maple or English Corkbark Maple — (107) Acer 

 campdstre. 



C. Leaves 3-lobed, thick and nearly evergreen, shiny above and 

 glaucous beneath; fruit slightly spreading. Montpelier 

 Maple (108) — Acer monspessul^num. 



* Leaves rounded, vine-like with 7-11 short, pointed, doubly serrated 



lobes. Vine Maples. (D.) 

 D. Stems of leaves and fruit smooth. Round-leaved Maple 

 (100) — Acer circin^tum. 



D. Stems of leaves and fruit downy when young. Japan Vine 

 Maple — Acer japonicum. 



* Leaves rounded and deeply 5-11 -lobed, the lobes pointed and doubly 



serrated. (E.) 



E. Stems of leaves and fruit smooth. Japan Maple (105) — Acer 

 palm^tum, 



