Stedung is a green plant as pandanus. It has thorns at each sides. In Prabumulih, South sumatera, it used for making traditional plaited mat and "ketupat." I'm sure you've known ketupat; ketupat is a lebaran day food here. It's not only for lebaran day but also for certain days. People will make 'ketupat of Stedung' in celebration parties. From leaves of Setedung , people here make 'ketupat' caused it has long endured time.
Now, 'Stedung' seldom found here. Only some houses which planted it beside or back of their house. If you're interested, you can come to Prabumulih, I'll show it to you.