Umm. Doesn't happen.

Please post a picture. If you need help with that, here it is:
http://forums.gardenweb.com/forums/load/hosta/msg0513322013993.html?14

Here is a link that might be useful: how to post images

Sounds like a case of juvenile Stone Pine (Pinus pinea) foliage being replaced by mature foliage.
Note the top part of the plant in the linked photo...

Here is a link that might be useful:

Agreed. It was never a spruce, but just juvenile needles on a pine.

Ditto to Stone Pine.

You can keep them permanently juvenile by growing them as bonsai with frequent pruning. It's a lot of hard work, though.

Resin

Thanks jaro_in_montreal. The linked photo is exactly what I have. Mystery solved.