NORWAY MAPLE
(Acer platanoides)
Leaves: Simple, opposite, generally 7-lobed, 4½″-5″ in diameter. Milky sap is evident after breaking the leaf stem. Leaves are heavier and thicker than those of [sugar maple].
Twigs: Stout, reddish brown. Buds red and green, blunt; end bud much larger than side ones; bud scales with keel-like ridges.
Fruit: Wings wide-spreading, larger than those of [sugar maple]. Matures in autumn.
General: Bark on young tree light brown, smooth; on older trees it becomes closely fissured but not scaly, dark in color. A tree of medium-size. Imported from Europe and planted extensively as a street tree. The leaves are often attacked by an aphid insect which produces quantities of a sticky substance, spotting vehicles and sidewalks. This species is classed as a soft maple.
BUTTERNUT
(Juglans cinerea)
Leaves: Compound, alternate; [leaflets] 11 to 17, each 3″-5″ long, small-toothed; dark yellow-green above, paler, hairy below. End leaflet same size as side leaflets. Main leaf-stem with conspicuous sticky hairs. One of the last trees to unfold its leaves in spring, and the first to shed them in autumn.
Twigs: Stout, greenish-gray to tan, rough, brittle. [Pith] chocolate-brown, chambered. Buds light brown, hairy, not covered with scales; end bud ½″-¾″ long, side buds smaller. Fringe of short hairs between [leaf-scar] and bud.
Fruit: An oblong nut, 1½″-2½″ long, covered with a hairy, sticky husk. Nut pointed at one end, shell rough, oily kernel sweet.