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DistributionMore info for the term: presence
Sixweeks grama has a disjunct distribution. It is widely distributed in the Southwest, occurring from California east to Oklahoma and south to Oaxaca, Mexico [28,41,70,83]. Disjunct populations of sixweeks grama are noted in Montana [17,48]. Conflicting information is found within the literature, stating that sixweeks grama is both introduced  and native  to Montana. Sixweeks grama is considered rare in Oklahoma because of limited distribution and/or presence in low numbers in the state . Grass Manual on the Web provides a distributional map of sixweeks grama in the United States. Sixweeks grama also occurs in Argentina .