Eriocaulon or Eleocharis?

After the last weekend’s GWAPA meeting, a few of us headed out to a drainage ditch, where there were supposedly a few eriocaulon plants to be found. We wound our way through some of the more rural parts surrounding Leesburg, VA, until we finally came to this run-off ditch, pictured below.

Sure enough, we found a number of plants there resembling an eriocaulon species. So, we dug one or two out to try in our tanks. I was currently without tank space to dedicate to this, so I left the task up to a few other GWAPA members. Pictured below is a bad picture of what we pulled out. Upon further inspection, it seems unclear whether this actually is one of the rare eriocaulon decangulare species found in Virginia, or whether it’s just an eleocharis species. If anyone has any insight, please speak up.