SummaryThirty three species and varieties ofNarcissusplus seventeen cultivars with recent species parentage were screened for resistance toFusarium oxysporumf.sp.narcissi.Accessions were either wholly resistant (bulbs remaining uninfected), partially resistant (a variable portion of the bulbs infected) or susceptible (all of the bulbs infected). Although a pattern of resistance was found among the species tested the genetic basis of the resistance is not known.