Popcorn Sedge

One invasive species that we commonly deal with here at Corkscrew is Scleria lacustris, known commonly as Popcorn Sedge or Wright's nutrush. Popcorn sedge is a wetland growing species, and can grow up to six feet tall, and sometimes even higher. This species is a particularly persistent invasive because of how well it establishes a seed bank in wetland areas. While there are several Scleria plants native to Florida, there are often easily distinguished by their much smaller size, and tendency to grow in less wet areas.

Cluster of Scleria plants growing in the marsh

Once seed heads are present on the plant, the primary method of treatment is mechanical removal, in order to prevent further establishment of the seed bank, which is what we have been doing for the last few days here at Corkscrew. First thing in the morning, we drive out to the site and unload all our materials onto the skiff. Then we float the boat through the marsh out to the cluster of plants we plan to tackle for the day. Once we arrive, we climb out into the knee-deep water, and begin removing the seed heads.

Seed head of Scleria lacustris

We always make sure to wear gloves when handling the Popcorn sedge. The edges of this plant are very sharp, and you can easily cut yourself even just brushing against it the wrong way, kind of similar to getting a paper cut. Once the seed heads are removed, we immediately place them in a garbage bag, which we dispose of at the end of the day. After all the seeds from one stalk are removed, we uproot the entire thing and make a pile up out of the water.

Pile of de-seeded Scleria plants

It took several days and at least ten bags of seeds to clear just one area, but it feels well worth it when you look and can really see the difference from when you started. 

Until next time!

~Amanda