I am not quite sure that the grass with the leaf is the same one that has the blade curl. Once the blade is curling I can't find a plant that has an attached leaf, but they all grow together. So what I am doing is watching a group of grass plants with the leaves to see if they turn into the curl bladed grass plants. I'm just an observer but I never knew of a grass type plant that also had a broad leaf. I haven't been able to find any in my online searches. I wonder if this is rare or new? And isn't this a great strategy for a grass plant to shoot up a broad leaf to the surface to pump energy quickly to the grass that is just starting to emerge, especially if the water was murky.