SAPINDACE. 
SILVA OF NORTH AMERICA. 53 
ACER SPICATUM. 
Mountain Maple. 
FLowErs in dense upright racemes; petals linear-spatulate, much longer than the 
sepals. 
Acer spicatum, Lamarck, Dict. ii. 381.— Persoon, Syn. i. 
417.— De Candolle, Prodr. i. 593. — Don, Gen. Syst. i. 
648. — Audubon, Birds, t. 134. — Spach, Ann. Sci. Nat. 
ser. 2, ii. 163; Hist. Veg. iii. 87. — Torrey & Gray, FU. 
NV. Am. i. 246. — Dietrich, Syn. ii. 1281. — Torrey, FU. 
NV. Y. i. 135. — Chapman, FV. 80. — Curtis, Rep. Geolog. 
Surv. N. Car. 1860, iii. 52. — Buchenau, Bot. Zeit. xix. 
285, t. 11, f. 23.— Koch, Dendr. i. 522. — Emerson, 
Trees Mass. ed. 2, ii. 567, t.— Bell, Rep. Geolog. Surv. 
Can. 1879-80, 54°. — Sargent, Forest Trees N. Am. 10th 
Census U.S. ix. 46. — Pax, Engler Bot. Jahrb. vii. 188. — 
Watson & Coulter, Gray’s Man. ed. 6, 117. — Wesmael, 
Gen. Acer, 16. 
Leaves 3 or slightly 5-lobed, tomentose on the lower surface. 
22, t. 2 (not Linneus). — Wangenheim, Nordam. Holz. 
82, t. 12, f. 30. — Marshall, Arbust. .4m. 2. — Castiglioni, 
Viug. negli Stati Uniti, ti. 172. 
. parviflorum, Ehrhart, Beitr. iv..25; vi. 40. — Moench, 
Meth. 56. 
. montanum, Aiton, Hort. Kew. iii. 435. — Schmidt, Oestr. 
Baum. i. 13, t. 11. — Michaux, Fl. Bor.-Am. ii. 253. — 
Willdenow, Spec. iv. 988; Hnwm. 1045. — Desfontaines, 
Hist. Arb. i. 391. — Nouveau Duhamel, iv. 33. — Trat- 
tinick, Archiv. i. t. 13. — Pursh, FU. Am. Sept. i. 267. — 
Nuttall, Gen. i. 253. — Guimpel, Otto & Hayne, Abdild. 
Holz. 59, t. 48. — Hayne, Dendr. Fl. 212. — Elliott, Sk. 
i. 452. — Sprengel, Syst. ii. 224. — Hooker, Fl. Bor.-Am. 
A. Pennsylvanicum, Du Roi, Diss. 61; Harbk. Bawm. i. i. 111. — Bigelow, FV. Boston. ed. 3, 408. 
A small bushy tree, rising occasionally to a height of twenty-five or thirty feet, with a short trunk 
six or eight inches in diameter and slender upright branches; or more often a tall or low shrub. The 
bark of the trunk is very thin with a smooth or slightly furrowed reddish brown surface. The branch- 
lets when they first appear are light gray and coated with pubescence which disappears during the 
summer ; in the winter they become bright red, especially when exposed to the full action of the sun, 
and the following summer turn gray or pale brown again and are then somewhat blotched or streaked 
with green towards the base. The winter-buds are acute; the terminal flower-bud is an eighth of an 
inch long and more or less coated with pale tomentum, the leaf-buds being much smaller and glabrous 
or somewhat puberulous. The outer scales are red; the second pair are densely white-tomentose and 
deciduous ; those of the inner ranks lengthen with the young shoots until at maturity they are an inch 
or more long, and are then lanceolate, pale and papery, and in falling leave narrow scars surrounding the 
base of the branchlets. The leaves are membranaceous, three or slightly five-lobed with taper-pointed 
lobes, and are conspicuously three-nerved with prominent veinlets; they are subcordate or sometimes 
nearly truncate at the base, sharply and coarsely glandular-serrate, and four or five inches in length by 
somewhat less in breadth, and are borne on slender petioles two or three inches long with enlarged 
bases. They are puberulous on the upper and densely tomentose on the lower surface when they 
unfold, and at maturity are hoary-pubescent below and glabrous above. The petiole is often scarlet in 
summer, while the blade of the leaf, which turns later to various shades of orange and scarlet, is still 
bright green. The minute greenish yellow flowers are produced together, the fertile towards the base, 
and the sterile at the ends of narrow many-flowered long-stemmed upright slightly compound pubescent 
racemes which appear during the month of June after the leaves are fully grown. The pedicels are 
thread-like and half to three quarters of an inch in length. The calyx-lobes are narrowly obovate, 
colored, pubescent on the outer surface, and much shorter than the linear-spatulate pointed petals. 
There are seven or eight stamens inserted immediately under the ovary, with slender glabrous filaments 
as long as the petals in the sterile flower and about the length of the sepals in the fertile flower, and 
glandular anthers. The ovary 1s densely coated with pale tomentum, and in the sterile flower is reduced 
