390 ACERACEAE 
at first incurved but later diverging, forming a key from an inch to 2 
inches across. Leaves turn brilliant crimson in early autumn. Found 
along river banks and in swamps but often grows in dry places. Flowers, 
March-April. 
3. A. saccharum, Marsh. (Fig. 2, pl. 92.) Sucar Mapre. Tree, 
similar to No, 1. Leaves 3 to 6 in. long, width greater than length, the 
5 lobes separated by rounded sinuses. Base of leaf heart-shaped, margin 
with few or no teeth except the extremities of the secondary lobes. Color 
dark green above, light green beneath. Flowers appearing with the 
leaves, greenish-yellow. Perfect or imperfect flowers in separate clusters; 
corolla wanting. Stamens 7 or 8. Wings of the “key” diverging, each 
from 3 to 1 in. long. The key hangs pendulous from a long and slender 
footstalk. Flowers appear in May. Tree found in woody uplands. From 
it is produced most of the maple sugar of the market. April-May. 
4. A. nigrum, Michx. Brack Sucar Mapre. Tree similar to the 
last. Leaves dark green both sides. Found in similar situations. Flowers 
appear in May. 
5. A. pennsylvanicum, L. (Fig. 3, pl. 92.) Srriep MAPIE. 
WHISTLE Woop. Moose Woop. A small tree, mostly in damp and shady 
woods. Height generally less than 30 ft. Leaves 5 to 8 in. long, rounded 
or heart-shaped at base, free end of 3 sharp lobes; border sharply toothed. 
Flowers yellow in long, narrow, drooping clusters, those bearing stamens 
usually in different clusters from those bearing pistils. Calyx and 
corolla present. The bark of this beautiful tree is of a dark green marked 
with streaks of reddish-brown. When young striped with lighter lines. 
In woods, most of our area. 
6. A. spicatum, Lam. (Fig. 5, pl. 92.) Mountain Marre. A small 
bushy tree, or more frequently a shrub. Leaves 3 to 5 in. long, rounded 
or heart-shaped at base, terminated by 3 lobes, the larger of which are 
often slightly divided into two. Flowers greenish-yellow in slender, erect 
clusters 5 to 7 in. long. The keys are from 1} to 2 in. across, Rocky 
woods, our area. Flowers in May. 
7. A. Negundo, L. (Fig. 6, pl. 92.) Box Exper. Small tree, with 
compound leaves of from 3 to 5 leaflets. These latter are from 2 to 4 in. 
long, oval or egg-shaped, sharply pointedwat apex and generally rounded 
at base. They are irregularly and coarsely toothed, the terminal one 
often 3-lobed. The “keys” are similar to those of other maples, but the 
wings are less diverging. Occasional in most of our area. 
The Norway Mapte, Acer platinoides, with leaves more rounded than 
the native sugar maples and with sinuses more shallow and color of 
darker green, is common as a planted tree in parks and along streets of 
cities and villages; and the Sycamore Mapte, A. pseudo-platanus, with 
smaller leaves, with more rounded lobes is also extensively planted as 
an ornamental tree. Neither are native species. 
Famity VIII—HIPPOCASTANACEAE. Buckeye FAMILy 
Trees and shrubs, with opposite compound leaves and conspicu- 
ous flowers in large clusters. Flowers irregular. Stamens 5 to 8. 
