103. Leaves usually coarsely
and irregularly shallow-lobed; bark of mature trunks strongly
peeling and curled, dark in color, often blackish in
general aspect or somewhat reddish (though younger bark may
be
whitish); the great majority of naturally occurring individuals
are
associated with the Mississippi and Wisconsin Rivers.
|
Betula
nigra |
103. Leaves usually not lobed;
bark becoming white and papery on trunks and branches greater
than 1-2 inches in diameter; various habitats.
|
104 |
|
