You could google images of the plants you mentioned above along with lemon-scented geranium and compare to what you have.
To post photos here, open a free account at a hosting site like Photobucket(what I use). Transfer your photos to an album there, then copy the HTML code below each photo and paste it directly into your message. Check the message preview to see your photo in your message before submitting your message. HTH

Certainly sounds like lemon balm.

I agree, lemon balm.

Ditto.

Here's the info on posting pictures.

FataMorgana

Here is a link that might be useful: photos

Thanks everyone! I'm so excited to start using it! We pulled out the food dehydrator recently... I think it's time to preserve some of that lemon-y goodness :)

You don't really need a dehydrator. Bit of a sledgehammer to crack a nut. It will dry perfectly well lying on the kitchen counter or hanging up, as will most herbs.

Flora- here in rainy western oregon, i've actually had mold issues when trying to hang dry herbs. they almost always come in wet, and then the natural humidity discourages drying quickly enough.
It might be overkill, but at least I know I'm going to get something out of it if i use the dryer!