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a. Entirely hardy under all conditions: Acer saccharum Quercus coccinea Sugar Maple Scarlet Oak Celtis occidentalis Quercus rubra Nettle Tree Red Oak Fraxinus americana Tilia americana White Ash American LindenUlmus americanaAmerican Elm b. Which should be selected with a thorough knowledge of the condi-tions under which they are to be used: |
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