1 "Lower glume of sessile spikelet with short hairs on the keels towards the apex; racemes 1–3, not conspicuously hairy." "Dichanthium tenue" 1 "Lower glume of sessile spikelet with a fringe of long hairs towards the apex; racemes 1–6; usually with dense hairs." 2 2 "Sessile spikelets 5–6 mm long, pedicellate spikelets male, racemes 1–3, usually purplish." "Dichanthium setosum" 2 "Sessile spikelets 3–4.5 long; pedicellate spikelets sterile; racemes usually 2–4, light coloured" "Dichanthium sericeum"