Barnyard Grass, Barnyard-grass, Barnyard Grass, Large Barnyard-grass: Echinochloa crus-galli (Synonyms: Echinochloa crusgalli, Echinochloa crus-galli ssp. spiralis, Echinochloa crus-galli var. crus-galli, Echinochloa crus-galli var. mitis, Echinochloa crus-galli var. occidentalis, Echinochloa occidentalis, Panicum crus-galli) - Introduced. Panicles with short side branches. Awnless or with long awns, the awns from 0-50 mm long. Fertile lemmas narrowing abruptly to a withering tip, the tip set off by a line of minute hairs seen at 25x.
American Barnyard Grass, Rough Barnyardgrass: Echinochloa muricata var. microstachya (Synonyms: Echinochloa crus-galli var. mitis, Echinochloa microstachya, Echinochloa muricata ssp. microstachya, Echinochloa muricata var. occidentalis, Echinochloa muricata var. wiegandii, Echinochloa occidentalis, Echinochloa pungens var. microstachya, Echinochloa pungens var. multiflora, Echinochloa wiegandii) - Native. Panicles with short side branches. Awnless or nearly so. If awns are present, they range from 0-6 mm , occasionally up to 10 mm. Fertile lemmas gradually tapering to a firm, stiff tip.