I'm not sure of this ID - could be U. oligotricha or U. trichopus.
Annual or loose perennial? No awns. Lower glume as long as spikelet. Glume 5-nerved.
I see U. mosambicensis, U. trichopus and U. stolonifera are all one species now = U. trichopus.
U. panicoides is prostrate and the lower glume is < half the spikelet length.
U. oligotricha has 5-20 racemes.