Chloris verticillata is a perennial grass (probably C4; see Waller and Lewis 1979), stems densely tufted, 10-40 cm tall.
Leaves mostly near base, sheaths compressed; blade 5-15 cm long, 0.2-0.4 cm wide, light green.
Flower spikelets with 1 fertile floret and one or several empty lemmas above it; glumes unequal, 0.2-0.4 cm, tip short-awned; lower, fertile lemma less than 0.3 cm, margins hairy, awn 0.5-0.9 cm, from near tip, sterile lemma much shorter, with an awn to 0.5 cm.; inflorescence of numerous spikes 6-15 cm long, in whorls along a short axis; blooms and fruits June-Oct.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Origin: Midwestern and western USA.
Habitat: Dry prairies.