MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 
emergency food of pinnated grouse; brown mountain beaver, fox squirrel, 
moose; species other than A. pennsylvanicwn and A. spicatiim (q. v.) in times 
of necessity are cut for food and building materials by beaver. Eaten to some 
extent by muskrat. The western species furnish good browse for livestock. 
Acer barbatum, see Acer saccharum. 
Acer bernardiniim, see Acer glalrum. 
Acer bracliypterunij see Acer floridanum. 
Acer calif ornicum, see Acer negiindo. 
Acer circinatum Pursh. Vine maple. 
Range: 1, 2, 4. 
Site: Well-drained, moist, sun, shade. 
Fruit: Samara, available in September. 
A large shrub to a small or rarely large tree; branches commonly rest on 
the ground, where they may root; slow growing, lives 80 to 90 years; wood 
used to some extent locally; will not furnish maple sugar; about 5,000 seeds 
per pound. 
Observations: Considered to rank with A. macropliyUum as third in im- 
portance as browse for Olympic wapiti; Pacific mountain beaver. Of some 
importance as livestock browse. 
Acer dasycarpiim, see Acer saccliarinum. 
Acer donglasii, see Acer gJadriim. 
Acer floridanum (Chapm.) Pax. Southern sugar maple. 
A. saccharinum floridanum Chapm., SaocJiarodendron floridanum (Chapm.) 
Nieuwl. 
Range: 28, 29, 30. 
Site: Well-drained, moist, sun. 
Fruit: Samara. 
A large tree closely related to A. saccharum. 
Var. viUipes Rehder (A. brachypterum Woot. and Standi.), occurs also in 
region 11. 
Acer glabrum Torr. Dwarf maple. 
A. tripartitum Nutt., A. bernardiniim Abrams, A. neomexicamim Greene. 
Range: 4, 9, 12, 13, 14, 15. 
Site: Dry, well-drained, sun. 
Fruit : Samara ; available in late autumn. 
Rarely a large shrub, commonly a small to large tree ; usually dioecious and 
growing in poor soils ; 13,000-20,000 seeds per pound. 
Var. dougJasii (Hook.) Dippel, (A. douglasii Hook.) occurs with the species 
in regions 4 and 12. 
Sfomacli records: Mountain sheep, plains white-tailed deer. Observations: 
Fair browse for mule deer. 
Acer grandldentatum Nutt. Bigtooth maple. 
A. saccharum grandidentatum (Nutt.) Sudw. 
Range : 7, 8, 9, 11, 12, 13, 14, 16, 19. 
Site : Well-drained, sun. 
Fruit : Samara ; available in September. 
A large shrub to large tree; flowers April-May. 
Acer interier, see Acer negundo. 
Acer kingii, see Acer negundo. 
Acer leucoderme Small. Whitebark maple. 
Saccharodendron leucoderme (Small) Nieuwl. 
Range : 28, 29. 
Site : Dry, well-drained, shade. 
Fruit: Samara, available in September. 
A large shrub to small or large tree often with a crooked trunk ; flowers in 
April. 
Acer macrophyllum Pursh. Bigleaf maple. 
Range : 1, 2, 3, 4, 5. 
Site: Well-drained, moist, sun, shade. 
Fruit: Samara, available July-September or persistent until winter. 
