Sporobolus R.Br.

Spikelets 1–2 mm long, dull green-grey, crowded in narrow spike-like panicles, awnless Sporobolus
Lowest branches of inflorescence not whorled (1 or 2 branches only)
Upper glume shorter than lemma
Inflorescence dense, narrow and spike-like; main axis hidden by the appressed branches except sometimes in the lower third.
Inflorescence loose, or narrow and interrupted and ± spike-like with the main axis visible between the branches in the upper two-thirds