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)

oakprairiefarm.com

Hi Albert Since you don't care if the grass killer kills any other nearby plants why not use Round-Up? Works for me (on my weeds-don't have any grass). Beca

Thanks! There was also a much taller species (some to 8 feet) that had a stem that almost looked like river cane. It too had the white 'fluffy' seeds. Any idea what that may have been?