Is there a source on the web to help me identify the plants that I bought?

www.floridadriftwood.com is good... I've had some snails with some of their
stuff, but not a biggie for me...

The local LFS is basically clueless. I bought a few, just because they
were
healthy looking, strong plants. Don't know if they are compatible with my
tank.

They'll probably do ok as long as you've got all the essentials, light,
nutrients and CO2...(for a higher tech tank/plant)

Do plants really have to come from a LFS? The plant we choose for the top
of our beta tank is just a nice leafy plant. Do aquarium plants have some
unique attributes?

All aquatic plants grow, underwater... that's the biggest....