Can anyone ID this plant for me? I've been keeping it in my apisto tanks for at least 20 years and have never known what it is. It grows slowly but can get very tall. Older plants will reach from the substrate to the surface. It's common for plants to grow with their leaves above the water. I've found that it grows in most soft & neutral to acid water and is very undemanding. it reproduces by runners - you can see this in the photo. I've never been able to find it in the plant books I have.
Thanks
Thanks