Delimitation and phylogeny of Aletris (Nartheciaceae) with implication for perianth evolution Molecular evidence for natural hybridization between Rhododendron spiciferum and R. spinuliferum (Ericaceae) Molecular identification of species in Prunus sect. Persica (Rosaceae), with emphasis on evaluation of candidate barcodes for plants Systematic positions of Lamiophlomis and Paraphlomis (Lamiaceae) based on nuclear and chloroplast sequences Phylogenetic relationships in the Neotropical tribe Hamelieae (Rubiaceae, Cinchonoideae) and comments on its generic limits Molecular phylogeny of Osmanthus (Oleaceae) based on non-coding chloroplast and nuclear ribosomal internal transcribed spacer regions Interspecific relationships of Caragana microphylla, C. davazamcii and C. korshinskii (Leguminosae) based on ITS and trnL-F data sets