Hordeum pusillum is an annual C3 grass (Waller and Lewis 1979), to 10-40 cm tall.
Leaves flat, 6 cm long, 0.2-0.4 cm wide, sheath margin not lobed.
Flower spikelets in sets of 3, the lateral ones small, awn-tipped, glumes about 1 cm, lemma short-awned; inflorescence spike 2-7 cm long, erect; May-June;
Wetland status: NL.
Frequency in NYC: Very infrequent.
Origin: Delaware and south.
Habitat: Open sites, roadsides, often in alkaline soil.