Hard to tell. Could be southern niaid. A lot of your questions can be answered by answering one. Is it an issue for you to fish or enjoy your pond. If it is then you can physical remove some or manage it with herbicides.

The second picture looks like naiad in water and some type of rush out of water. Hard to tell what type of rush without actually looking at it. This is a common plant that grows on pond margins and can be pretty tough to manage it is very hardy.


Fisheries Biologist, Texoma Hatchery.
www.texomahatchery.com