Small burr grass

Tragus australianus

 Tufted annuals with erect or ascending culms to c. 40 cm tall.

Orifice hairy; ligule a rim of short hairs; blade rolled in bud, rigid, small, flat, margins with stiff, tubercle-based hairs.

Inflorescence a cylindrical, spike-like panicle, 3–6 cm long, the axis pubescent, bearing short branches each with 2 spikelets. Spikelets sessile, 3.5–5 mm long, in pairs facing each other, each with 1 bisexual floret, rounded, densely spiny on the back, pairs of spikelets deciduous.