Yeah, making gelatin out of cartilage does spoil its delicious, crunchy texture...
On a serious note, adzuki beans make more sense as a thickener.
Emile:
Will you be able to keep an eye on this as it goes to seed? That might help a lot with identification.
Another way to go, would be to take a small plug of it to propagate at home, and order some gamma grass seed, then compare the two.
Your comment makes me think there could be a high-end restaurant in NY, SF, or Berkeley serving a tray of gamma grass sod that has a variety of microgreens (sunflower, corn, radish, buckwheat) sprouting up from it and maybe some clover in bloom, with a pair of scissors and some dressing on the side.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.