Reconstructing the introduction history of the invasive grass <i>Taeniatherum caput</i>‐<i>medusae</i> subsp. <i>asperum</i> in the western United States: Low within‐population genetic diversity does not preclude invasion

Our data are consistent with the pattern associated with multiple introductions and local or regional range expansion. Despite multiple introductions, invasive populations of T. caput-medusae subsp. asperum exhibit relatively low within-population genetic diversity (i.e., invasive populations possess low evolutionary potential). Apparently, low within-population genetic diversity does not preclude the invasion of this grass in the western US.