Most of the Brome grasses droop a little or a lot and Bromes in general have the largest spikelets of all.
Bromus ciliatus Fringed Brome Drooping Spikelets
Bromus tectorum Cheatgrass Straight-Awned
Bromus japonicus Japanese Brome Bent-Awned
Avena fatua Wild Oats Drooping Spikelets