Eastern White Pine, Pinus strobus L.
DISTINGUISHING CHARACTERISTICS: Leaves in bundles of 5, very slender, 2 to 5 (usually about 3) inches long, marked with fine white lines (seen with magnifying glass), very flexible. Cones elongate, 4 to 5 (rarely to 8) inches long; scales without prickles. Bark dark grey to nearly black with flat plates separated by shallow fissure; eventually dark and deeply furrowed with scaly, blocky plates.
SIMILAR TREES: No other pine commonly planted in Iowa has leaves in bundles of 5.
IOWA DISTRIBUTION: Native in northeastern Iowa and along Pine Creek in Muscatine County and the Iowa River in Hardin County, growing on bluffs, ridges, and wooded slopes, usually in well-drained soils. Planted throughout the state.
Forest and Shade Trees of Iowa (Third Edition), by Peter J. van der Linden and Donald R. Farrar
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