Echinochloa(redirected from billion-dollar grass)
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genus of grasses in the family Poaceae. Mostly good forage plants but linked anecdotally with outbreaks of primary photosensitization, in grazing ruminants. Toxin unidentified but some plants contain high concentrations of nitrate. Includes E. crus-galli (barnyard grass, Japanese millet), E. pyramidalis (antelope grass), E. utilis.