Maybe a grass with a smut disease?

Might be rice cut grass. Good for erosion control in wet areas. My experience is that if you get other plants growing they will compete with it pretty well. A weed trimmer might help getting the project started. I put a list of plants that commonly associate with this plant on my website, latin names only though. Here is a link that might be useful: Rice Cut Grass

It is true that if you (a homeowner) puts down some wheat straw (that is what it is called, not sure if it is really wheat), some seeds germinate and send up some tall grass. This is an annual and will disappear after a time (especially once you start mowing). There is another thing ... when road work is done, the crews spread down a mat of pre-seeded "stuff" on slopes and that sprouts and grows like crazy. Hopefully that is a combination of fast growing "grass" and long term grass, but I don't know what it is. You might could call DOT or some county department of roads and ask them if it is edible (and I imagine they will say No for liability reasons) or at least ask them what kind of seed it is. Or you could look on the web and see if you find any definition of these products. See link below. Here is a link that might be useful: Section 716Erosion Control Mats (Slopes)

While all of Florida is shown on range maps for sawgrass, I have never come across it in central Florida, myself. It is abundant in the Everglades, of course, and I suppose it crops up around here somewhere, but I really don't believe it would be a grass you would spot around Seminole County regularly. I could be wrong, of course, not being an expert on grass, but my best guess is the one you are asking about is something else. So...let's get us a picture. First thing you do is upload your picture to an online host like Photobucket. (It's free). Once you have your picture on Photobucket, you put a check mark in the box under the thumbnail of the picture, scroll to the bottom of the page, and click on the button that says Generate HTML & Image Code. A page will come up with 5 different codes. Highlight and Copy the second one and paste it into your GW message, et voila! Your picture will show up when you submit your post to GW. An easy way to share pictures here on a regular basis is to set up on album just for GW on Photobucket, and always load your pictures to that album. I have a folder on my desktop especially for Garden Web, and that's where I store mine on my computer. Then I upload from that folder to Photobucket, then do the copy & paste thingie, and the photos are then in your message. Hope this helps! Looking forward to seeing your mystery grass. Marcia