Digitized collections elucidate invasion history and patterns of awn polymorphism in Microstegium vimineum.

Premise: Digitized collections can help illuminate the mechanisms behind the establishment and spread of invasive plants. These databases provide a record of traits in space and time that allows for investigation of abiotic and biotic factors that influence invasive species.

Methods: Over 1100 digitized herbarium records were examined to investigate the invasion history and trait variation of Microstegium vimineum.