42 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 
coppices freely, especially when young ; very brilliant red in autumn ; wood much 
used commercially ; 18,000 seeds per pound, germination 70 percent, about 2,000 
usable plants per pound of seed ; vitality of seeds transient ; easily transplanted. 
Several varieties have been described, all occurring within the range of the 
species. 
Stomach records : Palm warbler; eastern chipmunk, white-tailed deer. Ob- 
servations Ten species of birds; cottontail rabbit; considered the fifth most 
important winter food of white-tailed deer in Massachusetts. 
Acer saeeharinuin L. Silver maple. 
A. dasycarpum Ehrh., Argentacer saeeharinuin (L.) Small. 
Range : 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 80. 
Site: Well-drained, moist, sun. 
Fruit : Samara, available April-June. 
A large monoecious or dioecious tree ; taproot small, lateral roots well de- 
veloped ; grows in a variety of soils ; at first rapid growing, later slower ; short- 
lived ; much subject to fungus diseases; wind-firm, but easily storm-damaged; 
easily damaged by fire ; coppices freely when young ; grows successfully on coal- 
stripped land in Illinois ; wood hard, strong, not durable, of importance com- 
mercially; much cultivated, with some six outstanding varieties known; seed 
vitality transient; about 2,400 seeds per pound, germination 50 percent, about 
400 usable plants per pound of seed. 
Stomach records: Gray eastern chipmunk, eastern chipmunk. Observations: 
Four species of birds ; cottontail rabbit, snowshoe hare, red squirrel, white- 
tailed deer. 
Acer saccharum Marsh. Sugar maple. 
A. barbatum (Michx.) Nieuwl., Saccharodendron barbatuni (Michx.) Nieuwl. 
Range : 15, 18, 21, 22, 28, 24, 25, 26, 27, 28, 29. 
Site: Dry, well-drained, moist, sun, shade. 
Fruit: Samara, available July-December. 
A large monoecious or dioecious tree ; usually occurs on rich soil ; root system 
shallow, wide spreading ; slow growing, long-lived ; seriously injured by fire ; 
wind-firm ; attacked by numerous insects ; wood hard, strong, not very durable, 
much used commercially ; produces maple sugar ; easily transplanted when small ; 
7,000 seeds per pound, germination 50-60 percent, about 1,500 usable plants per 
pound of seed. 
Four varieties are listed, varying among other things in the amount of hair- 
iness of the leaves. All occur within the range of the species except var. 
sinuosum (Rehd.) Sarg., (A. sinuosiim Rehd.) , which occurs in regions 17 
and 20. 
Stomach records: White-tailed deer. Observations: Four species of birds in- 
cluding ring-necked pheasant ; porcupine, red squirrel, cottontail rabbit ; heavily 
utilized by moose on Isle Royale ; white-tailed deer. 
Acer sinuosum, see Acer saccharum. 
Acer spieatum Lam. Mountain maple. 
Range: 23, 24, 26, 27. 
Site : Dry, well-drained, moist, sun, shade. 
Fruit : Samara, available August-November. 
A large shrub to small or large tree; ordinarily occurs on acid soil; clump 
forming ; wood used to some extent commercially. 
Stomach records: White-tailed deer. Observations: Cottontail rabbit, moose; 
beaver, where Populus is lacking, 
Acer stenocarpum, see Acer riibrum. 
Acer tesanum, see Acer negundo. 
Acer tripartitum, see Acer glabrum. 
Adelia acuminata, see Forestiera acuminata. 
Adelia angustifolia, see Forestiera angiistifoUa. 
Adelia ligustrina, see Forestiera ligustrina. 
Adelia neomexicana, see Forestiera neoniexicana. 
Adelia parvifolia, see Forestiera neomexicana. 
Adelia pubescens, see Forestiera pubescens. 
