Rare plants and exceptional specimens

Buttonbush
Gracing the pond edge since the Arboretum’s early years, this buttonbush has sculpturally twisted branches that become covered with distinctive mace-like flowers in early summer.
Franklinia
Of the dozen or so Franklin trees at the Arboretum, the largest and most spectacular resides among the pine trees near the pond. With shiny green leaves, late summer flowers, vibrant fall color, and striped bark, this species is outstanding in all seasons.
Pawpaw
An unusual tree, the pawpaw produces the largest fruits of any native tree. One of the largest and most productive pawpaws at the Arboretum grows on the bank of the service road, seen here in autumn.
Strawberry bush
Strawberry bush was found growing wild at the Arboretum more than 30 years ago. From this wild population, several were propagated and this is perhaps the largest and oldest on the grounds (seen here in fall).

Striped maple
Stretching its limits at the southern extreme of its hardiness, the striped maple does not typically do well in the warm Philadelphia region. Our 30 year old specimen is an exception worth seeing.
White Oak
The largest and most sprawling tree at the Arboretum, this oak is perfectly located in a patch of ferns on the bank of Trout Creek. The tree is not as old as it looks, but its placement has allowed for very fast growth.