Methods for selecting and evaluating taxa as invasive plant threats for a target location (Florida, United States). Data-based list processing led to the prioritization of 100 taxa for risk assessment. Rapid risk assessments performed by an expert panel included pathways for arrival and likelihood scores and certainty ratings for arrival, establishment, and impact. The three component likelihood scores were multiplied to get an overall score and certainty ratings were roughly averaged to get an overall certainty. Each risk assessment was evaluated with two rounds of review and a consensus-building discussion before the expert panel confirmed taxa rankings.