Help identifying plants?

I have three plants I'd like to get identified. If you can help, thanks!

I bought this first one, so I have no idea where it lives naturally. They said it will get tall and stringy in low light, and remain bushy and cute like mine if there's high light. I wrote down the name in a hurry and now I can't read what I wrote. Hahaha! Is it Blyxa japonica?



Then there's this one, which I dug out of an estuary on the Pacific coast in southern Washington. I could tell it was a freshwater plant, and as I guessed, it's doing much better in my tank than it did in the salty mudflat where it was growing. It's like grass, but the stalks are much denser and less flexible, they curl a bit, and they grow out of each other toward the bottom, almost like the leaves on chives. They're also pale toward the roots like chives. (I should just taste it and see if I grabbed some kind of water onion hehe)



And this one is from the same estuary. It's a carpet plant that reproduces with runners, and when I saw some growing where a spring flowed down a rock wall, I realized it was a healthier version of the limp, flat ones growing in the sand. It has tiny, rounded leaves that sprout from the stalks in pairs, except at the very top, where there might be four or more leaves. I'm guessing it might be "baby tears" (Micranthemum umbrosum), but I'm really no expert. Thoughts?

Thanks so much, everybody! You're all superhelpful.

I think the Japonica is so red because of the high/light CO2 where it was grown, like someone said, but also my camera is screwy, haha! I didn't think the color was that off until everyone mentioned it, but now if I glance over at the tank I can see it's not a good representation. Sorry!

I'll look more into that middle one, the one that might be "mondo grass." It's very likely it's nonaquatic, but since all of it that I could find was growing in the marsh itself, I figured I could try it and see if it minded. I don't have CO2 yet, but I'm planning on putting it in. I don't think it's a hair grass though--I have dwarf hair grass in one of my tanks, and it has a much different method of sprouting from its root system.

Thanks again!

Oh, and BK828, this is where I did most of my identifying: http://www.aquahobby.com/e_aquarium_plants.php They have the "baby tears" listed under Hemianthus--if mine's a different variety or something, that's fine, but if they're wrong you might want to let them know! (The error could be in my identification though, not theirs. It seems like the same common name sometimes exists for more than one species.)