Originally Posted by Quarter Acre
I'd say it's Pennywort, not lotus. In my experience, lotus comes up with much larger leaves right out of the water - a few to several inches across.

Your unknown #3 reminds me of some type of cone flower, but it's hard to tell without flowers on it.

Thanks! I guess you're probably right there. I just looked at some more photos and found ones with the round shape I'm seeing (the photos in the weed ID guide had more a clover-like or cloud-like shape).


Kris