Useful Trees of the United States, Issues 1-28 |
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AGRICULTURE American elm amount appear attack baldcypress bark basswood become beech birch black walnut boxes branches brown cause cedar coast color cones construction dark decay develops diameter disease Douglas-fir durable eastern hemlock eastern white pine feet fire flowers FOREST SERVICE frequently fruit fungus furniture green grows growth hard heartwood heavy height important inches long insects killed known lands leaf leaves length light longleaf lumber manufacture mature Michigan MILES moderately Mountains narrow native nearly needles North northern occur planting ponderosa pine principally range reach red spruce redwood resistant Revised roots sapwood seeds Sequoia shade shortleaf Sitka spruce soil sometimes southern southern pine species spruce stands straight strong sugar maple sweetgum thick thin timber trees trunk UNITED UNITED STATES DEPARTMENT usually valuable Washington West western western redcedar white oak wide winged wood yellow young