A worldwide community photographing and learning about wildlife
Phragmites australis
about 5-7 ft tall, looks fuzzy
Found them while I was biking by a small preserved prairie.
While I was approaching it, the ground got softer and softer when I looked down I realized I was walking on water and the only thing supporting my weight was a bunch of old stems.
It's been commonly thought that Phragmites was invasive but I believe it has been found in the fossil record back to 10,000 years.