First glume missing (vs. Urochloa) but consistent with Digitaria. Inflorescence nearly Y-shaped or with an extra branch or more below the Y (or the Y with 3 branches). Spikelets solitary (vs. usually in 2s or 3s in Digitaria); fertile lemma margins only weakly inrolled (vs. wrapped around in Digitaria)

Spikelets 1.6-3.5 mm; upper glume with pilose margins, 2-veined…A. fissifolius

Spikelets > 3.5 mm; upper glume with glabrous margins, 5-7-veined…A. furcatus