Reproductive ecology, population genetics, and clonal distribution of the narrow endemic: Mirabilis macfarlanei (Nyctaginaceae)

examined the reproductive biology and population genetics of the narrow endemic, Mirabilis macfarlanei (Nyctaginaceae) Constance and Rollins, from Idaho and Oregon. Breeding system results indicated that M. macfarlanei is self-compatible, but is not autogamous. Seed set was not pollen limited. Major floral visitors were Anthophora spp. and Bombus spp. Pollinators observations and pollen deposition indicated that visitation occurred during light hours and was lacking during the night. Most flowers opened in the late afternoon (1500-1900) (40%); however, 25% opened during the day (0700-1500). Floral morphometrics varied significantly among populations.;Using enzyme electrophoresis, I determined that M. macfarlanei had low genetic diversity. In multi-locus clonal maps there is evidence that genets were generally not large (average of 4.8 ramets per genet). Direct estimate of outcrossing was t = 0.56, indicative of both selfing and outcrossing. The measure of genetic differentiation...