Muhlenbergia bryophilus (Döll) P. M. Peterson

Slender often sprawling, caespitose annuals. Culms (4–) 6–30 cm long, glabrous below the nodes; internodes 0.6–6 cm long, glabrous to pilose. Leaf sheaths mostly 0.5–4.8 cm long, shorter than the internodes, glabrous to sparingly pilose; ligules 0.6–1.5 mm long, glabrous, apex mostly truncate, lacerate, auricles absent; blades 1.5–6 cm long, 0.5–1.5(–1.7) mm wide, flat, scaberulent and pubescent above, mostly smooth beneath. Panicles 2–6 cm long, 0.5–1.2 cm wide, open, loosely-flowered; primary branches 0.2–0.6 mm long, excluding the awns, one per node, racemosely inserted. Fertilespikelets 2.4–3 mm long, in fascicles of two, rarely three per branch, often greenish or purplish, the clusters with one short-pedicelled spikelet (bisexual); pedicels (0.0−) 0.2–0.5 mm long (fertile spikelets) and the other two spikelets (sterile or staminate) longer pedicelled; pedicels about 0.7–1 mm long (sterile or staminate); glumes 1–1.3 mm long, narrowly acuminate, apex prolonged, aristate; lemmas 2.4–3 mm long, 3-awned, the central awns (3–) 5–8 (–12) mm long, lateral awns usually 0.8–1.4 mm long; paleas 2.2–2.8 mm long, puberulent, apex aristate, the awns usually 1–1.2 mm long; anthers 0.5–0.7 mm long, yellowish. Caryopses about 1 mm long, obovoid, light brownish.

Muhlenbergiabryophilus is found in South America, occuring in Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador and Peru.