Maximum-likelihood tree of nrDNA haplotypes of Rhododendron pseudochrysanthum s.l. Numbers at nodes indicate bootstrap values (>50%). Major clusters A, B and C are indicated. Divergent times at nodes were estimated based on BEAST analyses. FR: R. formosanum. HR: R. hyperythrum. PR: R. pseudochrysanthum s.l. Symbols: Alishan Mountain Range (blank circle), Central Mountain Range (black circle), Sheishan Mountain Range (blank square), and Yushan Mountain Range (black square).