. Concord area trees and shrubs. Botany; Trees; Shrubs. QUAKING ASPEN TREES ALTERNATE SIMPLE LEAVES POPLARS: Leaves with 3-5 stout veins meeting at leaf base. Leafstalks usually flattened and compara- tively long. At least upper trunk bark smooth and pale (usually tan-colored). Note: Atypical leaves are not uncommon in this group, particularly late in the season after stripping of first leaves by insects. QUAKING ASPEN Populus tremuloides Leaves fine-toothed (sometimes obscurely) with 20-40 teeth on each margin. Lower bark usually pale-smooth as well. Name derives from leaves which flutter at
. Concord area trees and shrubs. Botany; Trees; Shrubs. QUAKING ASPEN TREES ALTERNATE SIMPLE LEAVES POPLARS: Leaves with 3-5 stout veins meeting at leaf base. Leafstalks usually flattened and compara- tively long. At least upper trunk bark smooth and pale (usually tan-colored). Note: Atypical leaves are not uncommon in this group, particularly late in the season after stripping of first leaves by insects. QUAKING ASPEN Populus tremuloides Leaves fine-toothed (sometimes obscurely) with 20-40 teeth on each margin. Lower bark usually pale-smooth as well. Name derives from leaves which flutter at the least breeze. A short-lived weed tree. Dry, open woods, recent clearings, poor soil. Common. BIGTOOTH ASPEN Populus grandidentata Leaves coarse-toothed with 5-15 teeth on each margin, densely hairy at first, becoming hairless in maturity. Most of bark pale-smooth. Dry, open woods, recent clearings. Common. BALM-OF-GILEAD Populus X gileadensis Leafstalks usually rounded. Leaves fine- toothed (3-4 teeth per cm.), somewhat hairy beneath especially on midrib and principal veins; young ones fragrant when crushed. Roadsides. Rare escape. COMMON COTTONWOOD Populus deltoides Leaves somewhat triangular, coarse- toothed; leaf tip tapered. Leafstalk with small glands at leaf base. Mature bark gray, ridged or scaly. Woods, river bottomlands, roadsides. Uncommon escape. WHITE POPLAR Populus alba Leaves irregularly very coarse-toothed or lobed, white-hairy beneath, very dark green above. Leafstalk usually rounded. Occasionally escapes Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Angelo, Ray, 1948-; Angelo, Ray, 1948-. Cambridge, Mass. : Concord Field Station, Museum of Comparative Zoology, Harvard University
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Keywords: ., bookcentury1900, booksubjec, booksubjectbotany, booksubjectshrubs
