1hon MSN
Pittsburghers preserving pawpaw trees, some hope it will lead to more zebra swallowtail butterflies
The deciduous tree supports the zebra swallowtail butterfly — a species that has all but disappeared from the Pittsburgh ...
On a wooded hillside along the banks of the Allegheny River, Gabrielle Marsden brushed up against an oblong leaf: Asimina triloba. The American pawpaw. The deciduous tree bears North America’s largest ...
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