Botany Department, Morris
Arboretum of the University of Pennsylvania
Pennsylvania flora includes over 3,000 kinds of plants, Abies
third of the plants that grow in Pennsylvania today are not
native to the state, that is, they were not here when the
first European settlers arrived. These plants have
been brought here deliberately or by accident. Some of
them have become serious invasive weeds.
of Pennsylvania's plants are becoming increasingly hard to
find in the woods because deer are voraciously consuming so
much of Pennsylvania's plant cover, especially
low-growing wildflowers and shrubs.