Shrub in W PA

I was stuck in traffic and looked out the side and saw a row of these shrubs with what appears to be mast of some sort.
Is this hazelnut? I don't think it is. So what is it?

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I'm traveling and can't see to well on my phone, but it looks like Halberd-Leaved Rose Mallow - a type of Hibiscus.

Looks like Rose of Sharon to me

Now that I can see the pictures on the computer I agree with Rose of Sharon. Both of the above mentioned shrubs are "Hibiscus" (Hibiscus Laevis) and (Hibiscus syriacus), and they look very similar.

Rose of Sharon is an invasive species from Asia. The other is a native plant. I've read that they have come up with some varieties of ROS which are infertile and not invasive.

Thanks guys.

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Native Hunter said:

Now that I can see the pictures on the computer I agree with Rose of Sharon. Both of the above mentioned shrubs are "Hibiscus" (Hibiscus Laevis) and (Hibiscus syriacus), and they look very similar.

Rose of Sharon is an invasive species from Asia. The other is a native plant. I've read that they have come up with some varieties of ROS which are infertile and not invasive.

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Invasive is correct. My neighbor had one. Now I have about a hundred of them !!

The deer do not browse our Rose Of Sharon shrubs here nor do they eat the seed pods which remain on the shrub through a good part of the winter. They do produce a lot of seeds and they spring up quickly into small tree-like seedlings. It is a hard dormant plant that can take a lot of wind and cold temps but it dies here in flooded years when other plants do not. It is a great cottage garden plant adding height and color to the garden but not one we would want on our deer wood property.