. Wild flowers and trees of Colorado. Botany. FOREST FORMATIONS AND FOREST TREES 59 2a. Leaves with minute teeth near the apex; fruit generally one-seeded. Sabina monosperma (Engelm.) Rydb. 2b. Leaves entire at apex; fruit generally several-seeded. The common cedar of the eastern slope. Sabina scopulorum (Sarg.) Rydb.. Fig. 46.—-Rocta Mountain Red Cedar (Sabina scopulorum). X £ Genus 6. POPULUS, Poplars, Cottonwoods, Aspen These are the most important trees of the river-bottom and canyon forests. The broadleaf cottonwoods seldom extend far up the canyons and the narrowleaf trees seldom get dow

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. Wild flowers and trees of Colorado. Botany. FOREST FORMATIONS AND FOREST TREES 59 2a. Leaves with minute teeth near the apex; fruit generally one-seeded. Sabina monosperma (Engelm.) Rydb. 2b. Leaves entire at apex; fruit generally several-seeded. The common cedar of the eastern slope. Sabina scopulorum (Sarg.) Rydb.. Fig. 46.—-Rocta Mountain Red Cedar (Sabina scopulorum). X £ Genus 6. POPULUS, Poplars, Cottonwoods, Aspen These are the most important trees of the river-bottom and canyon forests. The broadleaf cottonwoods seldom extend far up the canyons and the narrowleaf trees seldom get dow
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Image ID: RDWNAK
. Wild flowers and trees of Colorado. Botany. FOREST FORMATIONS AND FOREST TREES 59 2a. Leaves with minute teeth near the apex; fruit generally one-seeded. Sabina monosperma (Engelm.) Rydb. 2b. Leaves entire at apex; fruit generally several-seeded. The common cedar of the eastern slope. Sabina scopulorum (Sarg.) Rydb.. Fig. 46.—-Rocta Mountain Red Cedar (Sabina scopulorum). X £ Genus 6. POPULUS, Poplars, Cottonwoods, Aspen These are the most important trees of the river-bottom and canyon forests. The broadleaf cottonwoods seldom extend far up the canyons and the narrowleaf trees seldom get down to the lower altitudes of the plains region. 1 a. Leaf-stalk much flattened laterally where attached to blade of leaf. Leaves easily rustled by the wind. (2) lb. Leaf-stalk nearly cylindrical where attached to blade. (3) 2a. Leaf-blade somewhat circular in outline with short-pointed apex. Bark very white. Populus tremuloides Michx. "Quaking Aspen" 2b. Leaf-blade broadly triangular or heart-shaped; marginal teeth less than ten on each side of blade (tree of southern Colorado). Populus wislizeni (Wats.) Sarg. "Broadleaf Cottonwood" 2C. Leaf-blade broadly triangular or heart-shaped; marginal teeth more than ten on each side of blade. (This is the common broadleaf cottonwood at Denver and in northern Colorado.) Populus sargentii Dode. "Broadleaf Cottonwood". 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 work.. Ramaley, Francis, 1870-1942. Boulder, A. A. Greenman