Tree id

[bjrogg]

I thought ash to , but I don't have hickory so not sure about it.
Bjrogg

[PatM]

Bark looks like Bitternut Hickory.   Ash  bark has a softer quality to it.  Bitternut bark kind of looks and feels like a typical rough sinew backing.

[PaSteve]

I don't know but I live in eastern PA and all the ash around here is dead or dying from the ash borer. Maybe it hasn't hit western PA as bad.

[Ringeck85]

I say it's hickory.  Pignut (or Mockernut maybe?).  That sapling would make a Great bendy handle bow!!  Cherokee style flatbow, or maybe something like a Sudbury where the handle is rigid but not too high. 

For those suggesting Pecan: Pecan is not very common that far north (Pennsylvania right?), and its compound leaves have many more leaflets (To me it looks kinda like a wimpy Black Walnut leaf, they're both usually much longer and have more leaflets than hickories).  Also the bark on pecan is usually rougher looking from what I remember living in Tallahassee and Quincy, FL, where it was/is very commonly planted in rural areas.

[PatM]

Bitternut is in the "Pecan"  part of the Hickory family.   They even form hybrids although other hickories less closely related will also cross.

[SLIMBOB]

The leaves AND bark look like our Ash here. Does not look at all like our Pecan.

[Pat B]

Bitternut hickory(Carya cordiformis) and pecan (C. illinoensis) are 2 different species of hickory. This is from Michael A. Dirr's, "Manual of Woody Landscape Plants" a textbook from my horticultural studies. He also says that the bitternut nuts are so bitter that squirrels prefer other hickories over them.
 We don't have enough ash trees here for me to to be familiar with and the few that are here have been attacked by the emerald ash bore.

[rps3]

I cant say for sure what it is, but I live in sw pa also and most large ash are dead, but I can still find a good many that size still alive.

[loefflerchuck]

Slice a small stem and see if it is spotted. Thats how I tell between ash and hickory

[PatM]

An end cut of the wood will also answer.  I still think it's hickory.

[Bob Barnes]

again... Maple, Ash, and Dogwood have opposite branching... hickory is alternate.

[Jakesnyder]

It has opposite branches so ash. Now to determine if it will make a bow. It has a whitish under the leaves so I'm thinking its white ash. Anyone agree?