File:Bulletin (Pennsylvania Department of Forestry), no. 11 (1901) (19879217554).jpg

Title: Bulletin (Pennsylvania Department of Forestry), no. 11
Identifier: bulletinpennsylv11penx (find matches)
Year: 1901 (1900s)
Authors: Pennsylvania. Dept. of Forestry
Subjects: Forests and forestry
Publisher: Harrisburg, Pa. : The Department : WM. Stanley Ray, state printer of Pennsylvania
Contributing Library: Penn State University
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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192 STRIPED MAPLE. t Acer pennsylvanicum, Linnaeus. FORM—Usually from 10-25 ft. in height with a diameter of about 6-12 Inches, but may attain a height of 40 feet. Trunk usually short dividing into slender and straight branches which form a deep and broad crown. BARK—Thin, rather smooth, greenish or reddish-brown, conspicuously marked with longi- tudinal white streaks; later becomes rougher, darker, and less streaked. See Fig. 63. TWIGS—Smooth, stout, at first greenish, later red, with very few inconspicuous lenticels, and brown pith. Season's growth marked by 3 or sometimes 3 dark lines encircling the twic, formed by fallen outer bud scales. White longitudinal streaks appear the second season. BUDS—Opposite, evidently-stalked,' large, about 2/5 of an inch long excluding stalk tapering but blunt-pointed, red, glossy, angular, covered by a single pair of red, smooth, val- vate scales enclosing a few pairs of smaller and lighter scales. Outer scales are smooth on surface with ciliate margins while the inner scales are hairy as shown in opposite plate. Terminal buds are large while lateral buds are smaller and closely appressed. LEAVES—Opposite, simple, goose-foot-like, 3-lobed at apex, finely serrate on margin, rounded at base, rusty-pubescent below. Petioles long, grooved, with enlarged bases. LEAF-SCARS-Opposite. broadly U-shaped, nearly encircle stem; adjacent edg^s form rather blunt teeth which are separated by a ridge. iJundle-scars usually 3. often subdivided into 5-8. FLOWERS-Appear in May or June after the leaves are full grown In drooping terminal racemes. Staminate and pistillate flowers occur on same plant but in different clusters. FRUIT—Matures in September in drooping racemes; wings of the keys, thin, very divergent, about i of an inch long, marked on one side of seed with a depression. WOOD—Diffuse-porous; soft, close-grained, light brown with wide zone of sapwood. Seldom used commercially. Weighs 33.02 lbs. per cubic foot. DISTINGUISHING CHARACTERISTICS—The Striped Maple, also known as Moosewood and Wh stlwood, can be readily distinguished at all seasons of the year by the light longitu^i.na streaks on the branches and trunk. They often appear the second year and Pe^ist o many years on the trunk. In winter the large, evidently-stalked, valvate. and red buds J^gether with the smooth branches and brown pith are characteristic. In summer the drooping raceme o7 flowers and the goose-foot-like leaves with their finely serrate margins and rusty pubescence on the lower surface are distinctive. RANGE—From Nova Scotia west to Minnesota, south especially along the mountains to Georgia. DISTRIBUTION IN PENNSYLVANIA-Rather common locally In the mountainous Parts «f the «tate especially on shaded slopes and in deep ravines. Very common m Mifflin, Centre, Blair, and Huntingdon counties. HABITAT—It prefers moist, cool, shaded, often rocky mountain slopes. IMPORTANCE OF THE SPECIES—The wood is of practically no commercial value. The chief value of the tree is its attractive ornamental qualities boUi as an individual tree and as a component of the understory of the forest btructure.
Text Appearing After Image:
PLATE CIV. STRIPED MAPLE. 1. Branch witli drooping raceme of staminate flowers, x i. 2. Branch with drooping raceme of pistillate flowers, x h. 3. Branch with mature leaves and drooping raceme of fruit, x i. 4. A maple key with exposed seeds, x ;. 5. Section of winter branch showing striped bark, buds, and leaf-scars, x J. 6. Terminal section of winter twig showing evidently stalked buds with outer pair of bud scales separated, exposing the pubescent inner scales, natural size. 7. Section of winter twig showing opposite and stalked Inids, and leaf-scars with bundle-scars, x i.

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