What type of plant is this and how should it be placed?.

[Bdoggy]

These stem plants I got from the LFS... I do not know the name of the plant or how to place it... The guy said to just stick them in the gravel. They don't have roots, but they do shoot out white tendrils that may be for anchoring to objects in the water..
I just want to know what they are and then I can figure out how best to care for them. I'll leave pics.
Thanks,
B.

 

[Razzmatazz]

Looks like anachris.

 

[Crispii]

Anacharis (Elodea densa). Like all stem plants, you can plant them in the back or you can just float it. The white tendrils you see are actually the roots.

 

[Colin_T]

Elodia.

A lot of aquarium plants are sold as cuttings. They will normally develop roots in a few weeks if conditions are good.

 

[Sgooosh]

waterweed, anacharis, elodea, elodia
looks really pretty, make sure to replant cos it gets leggy and shoots off too many roots

 

[itiwhetu]

If you have a tropical tank this may not be the best choice, Elodea prefers cold water.

 

[Bdoggy]

If you have a tropical tank this may not be the best choice, Elodea prefers cold water.

Some of them have almost doubled in size.. they seem to be doing great

 

[Sgooosh]

If you have a tropical tank this may not be the best choice, Elodea prefers cold water.

Long time ago, I made the rookie mistake of collecting wild elodea, and it’s been living pretty well in 75 semi tropical tank
Sometimes it randomly goes yellow and dies, maybe because if that