Plants perennial; cespitose. Culms 15-80 cm. Sheaths glabrous;
ligules ciliate; blades 3-15 cm long, 1.5-2 mm wide, glabrous
or sparsely pilose near the base. Panicles with 2-4 branches, these entangled
for most of their length, separable only with difficulty, forming a narrow,
cylindrical, spikelike inflorescence, individual branches visibly distinct only
at the tips; branches 3-12 cm, tightly appressed and adherent, with 9-12
spikelets per cm. Spikelets imbricate, with 1 bisexual and 3 sterile
florets. Lower glumes 1.5-2 mm long, about 0.3 mm wide; upper glumes
2.1-2.6 mm long, 0.3-0.6 mm wide; lowest lemmas 2.7-3.5 mm, ovate, margins
and keels hairy, hairs to 2 mm, awns 2.7-3.4 mm; second florets about
1.9 mm, glabrous, awned; distal florets unawned. Caryopses 1.2-1.8
mm long, 0.5-0.7 mm wide, trigonous. 2n= 40.
Chloris berroi is native to the Rio de la Plata region of Argentina and
Uruguay. It has been cultivated at scattered locations in the United States
(Hitchcock 1951), but is not known to be established in the Flora region.