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Key to the Trees of Wisconsin
90. Lowest
scale of lateral bud centered over the leaf scar; bark of
young trunks (and branches older than two years) grayish-green
in color and remaining smooth; petioles laterally compressed
on several (but not all) species.
90. Lowest
scale of lateral bud not centered over the leaf scar, offset
to either side; bark of young trunks and branches smooth or
not, but not grayish-green; petioles round in cross-section
or nearly so, not laterally compressed.
