80 
ACERACEJE. (MAPLE FAMILY.) 
— Styles 2: ovary surrounded at the base by a glandular* 
lobed disk into which the 5-12 stamens are inserted, 2- 
celled, with 2 pendulous anatropous ovules in each: from 
the back of each carpel grows the wing, converting the fruit 
into a pair of separable 1-seeded samaras. Seed nearly 
without albumen, variously coiled, and the leaf-like cotyle¬ 
dons crumpled. 
ACER, L. Maple. 
Calyx 5-lobed or of 5 sepals. Petals 5, or none. Stamens 
6-8, rarely 5. — Flowers mostly polygamous. Leaves simple, 
palmately lobed, mostly heart-shaped at the base. (The classical 
name of the Maple, from the Celtic ac, hard.) 
* Flowers in terminal racemes , later than the leaves : stamens 6-8. 
L A. Pennsylvunicuin, L. (Striped Maple ) Leaves 
3-lobed at the apex, finely and sharply doubly serrate ; the short lobes 
taper-pointed, and also serrate ; racemes drooping , loose ; petals obo- 
vate ; fruit with large diverging wings. (A. striatum, Lam-) —Rkh 
woods, Maine to Michigan. June.— A small slender tree, with 
light-green bark striped with dark lines, and greenish flowers and 
fruit. Also called Striped Dogwood 1 and Moose- Wood . 
2. A. spicatum, Lam. (Mountain Maple.) Leaves 
downy underneath, 3- (or slightly 5-) lobed, coarsely serrate, the lobes 
taper-pointed; racemes upright , dense , somewhat compound ; petals 
lincar-spatulale; fruit with small very divergent wings. (A. monti- 
num, Ail.) Moist hill-sides in woods, Maine to Michigan north¬ 
ward. June. — A tall shrub, forming clumps. 
* * Flmoers umbellate-corymbed , appearing with the leaves. 
•L A. saccharimim, Wang. (Sugar Maple. Rock Ma¬ 
ple.) Leaves 3-5-lobed, with rounded sinuses and pointed sparing¬ 
ly sinuate-toothed lobes, either heart-shaped or nearly truncate at the 
base, whitish and smooth or a little downy along the veins beneath; 
flowers from terminal leaf-bearing and lateral leafless buds, drooping 
on very slender hairy pedicels; calyx hairy at the apex ; petals none; 
wings of the fruit broad, slightly diverging. — Var. nIgrum. (Black 
Sugxr-Mafle ) Leaves green both sides, minutely downy even 
when old, the lobes rather wider, and the sinus at the base often 
cose . (A. nigrum, Michx.) — Rich woods, most abundant north¬ 
ward or m mountain valleys. April. 
* * * Flowers in umbel-like clusters arising from lateral leafless buds , 
, JT^ding the leaves : stamens 3 -6. 
. • aa.sycd.rpum, Ehrhart. (White or Silver Maple.) 
