aly J 
398 ACERACEAE, ~ [Vor II. 
3. Acer Drumméndii H. & A. Drummond’s Maple. (Fig. 2374.) 
Acer Drummondii H, & A.; Hook. Journ. Bot. 1: 
200. 1834. 
Acer rubrum var. Drummondii Sarg. toth Census 
U.S. 9:50. 1884. 
A large tree, similar to the preceding species. 
Leaves 3/-6’ long, thicker, 3-lobed, or sometimes 
5-lobed, obtuse or cordate at the base, densely 
whitish tomentose beneath when young, the 
tomentum persisting, at least along the veins, 
the lobes shorter, broader, acute or acuminate; 
young twigs and petioles more or less tomen- 
tose; flowers in lateral sessile fascicles unfold- 
ing much before the leaves; petals present; 
fruiting pedicels 1/-2’ long; samaras glabrous, 
more or less incurved, 114/-21%4’ long, the wing 
5//-10’’ broad at middle. 
In swamps, southern Missouri to Georgia, Florida 
and Texas. Fruit brilliant scarlet, ripening in 
March or April. 
Acer Saccharum Marsh, Arb. Amer. 4. 1785. 
Acer saccharinum Wang. Amer. 36. pi. 2. f. 26. 1787. 
Not L. 1753 
Acer barbaium Michx. F1. Bor. Am. 2: 252. 1803. 
A large and very valuable tree, with maximum 
height of 100°-120° and trunk diameter of 2}2°- 
314°. Leaves 3/-6’ long, dark green above, pale 
beneath, cordate or truncate at the base, 3—7-lobed, 
the lobes acuminate, irregularly sinuate, the sinuses 
rounded; flowers in sessile, lateral or terminal 
corymbs, greenish yellow, drooping on capillary 
hairy pedicels, appearing with the leaves; petals 
none; samaras glabrous, slightly diverging, 1/—1}2’ 
long, the wing 3//-5’’ wide. 
In rich woods, Newfoundland to Manitoba, south, 
especially along the mountains, to Florida, Nebraska 
and Texas. Its sap is the main source of maple sugar. 
Wood hard, strong, light reddish-brown; weight per 
cubie foot 43 Ibs. The bird’s-eye and curled maple 
of cabinet makers are varieties. April-May. 
(, 
US 
5. Acer nigrum Michx. Black Sugar Maple. 
(Fig. 2376.) 
Acer nigrum Michx. f. Hist. Arb. Am. 2: 238. pl. 76. 1810. 
Acer saccharinum vat nigrum T. &. G. Fl. N. A. 1: 248. 1838. 
Acer Saccharum var. nigrum Britton, Trans. N. Y. 
Sci. 9: 10. 1889. 
A tree, nearly or quite as large as the Sugar Maple, with 
rough, blackish bark. Leaves similar, but green both 
sides, thicker and generally more or less pubescent be- 
neath, especially along the veins; lobes much broader and 
shorter, with few undulations or frequently entire, the 
basal sinus often narrow; samaras slightly more divergent. 
Ontario and Vermont to northern Alabama, west to Minne- 
sota, Louisiana and Arkansas. Wood resembling that of the 
preceding species, the sapal so yielding much sugar. April- 
May. 
