Notes on naturalized plants in Hiroshima Prefecture: 3. New locality and nrITS variation of Lactuca serriola L. (Asteraceae)

Abstract

A naturalized plant, Lactuca serriola L. (Asteraceae) was collected from Hiroshima Prefecture, Honshu, southwestern Japan for the first time. This species was found growing by the road side at a reclamation area in Fukuyama, Mihara, Higashi-hiroshima, Hiroshima, Hatsukaichi and Otake Cities in the prefecture. Three individuals in Hiroshima and Hatsukaichi Cities including two formae, fo. serriola and fo. integrifolia, share a single haplotype of the nuclear ribosomal internal transcribed spacer (nrITS).