Plant ID

I was hoping someone could help me out with ID's on these two plants.
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Thanks in advanced for the help.

I did some more searching and believe the bottom plant to be southern or slender naiad. Can someone confirm this.

I collected some plants in the Potomac river a few weeks ago that look nearly identical to yours, but didn't bother to ask. Thought I would mention that in case the range mattered, but that second one especially looks EXACTLY like what I have.

Ok,I'm still looking and now believe the bottom pick is brittle waternymph najas minor.Is this correct?

First one might be a Potamogeton; it clearly has alternate leaf arrangement. Najas species all have opposite leaves.

First one might be a Potamogeton; it clearly has alternate leaf arrangement. Najas species all have opposite leaves.

The first one is a Potamogeton sp. It's sago pondweed.

Thanks Nate!

A close up of the leaves, especially of the leaf bases, would help. At this range, it could be a number of things.

For the first plant, a few of the Potamogetons are good candidates, such as P. robbinsii, P. epihydrus, P. tennesseensis, Pl foliosus, P. hillii, P. zosteriformis, P. obtusifolius, P. diversifolius, P. bicupulatus... etc. etc. etc. Species in the Potamogeton genus are highly plastic, so it can be especially tricky without really getting in close. Also could be Heteranthera dubia.

For the bottom plant, Najas gracillima comes to mind. Again, close-up photos would help,especially of the basal leaf sheath. Does it have tiny jagged spots on the leaves?

Also, it would help to know where these were found.