My guess would be Miscanthus 'Morning Light'. What zone are you in and when does it leaf out? I'm in 5B (SE Mich) and mine leafs out pretty late... my miscanthus leaf out a lot later than my Calamagrostis 'Overdam'... I can't give exact times, but it's probably late April for Overdam vs. early June for Morning Light and the other miscanthus I have.
