Eragrostis pectinacea is an annual C4 grass (Ludwig et al. 2010), slender, short, densely tufted, 10-60 cm tall, erect, or bent only at base, often branching from lower nodes, sheaths shorter than internodes, top of sheath with long-hairy lobes, ligule a band of short hairs.
Leaves alternate, 2.5-10 cm long (Hilty 2006), 0.1-0.4 cm wide.
Flower spikelets small, 0.5-0.8 cm long, 0.1-0.2 cm wide, gray 6-15 flowers , glumes much shorter than spikelet, keel minutely toothed, lemmas 0.1-0.2 cm, grain to 0.1 cm, palea persistent on spikelet axis; inflorescence 5-25 cm long, usually 1-2 branches per node, diffuse, delicate, bearing spikelets from near base, spikelet stalks appressed to branch; blooms and fruits July-Oct.
Wetland status: FAC.
Frequency in NYC: Occasional.
Habitat: Open, moist sandy soil, ditches, disturbances.