Four new synonyms and a new combination in Parnassia (Celastraceae)

Abstract. Parnassia yunnanensis had been previously described based on mixed specimens containing materials partially belonging to Parnassia cacuminum, which makes the application of Parnassia yunnanensis ambiguous. Therefore, we lectotypified Parnassia yunnanensis and meanwhile synonymized Parnassia lanceolata var. oblongipetala under it. Parnassia yunnanensis var. longistipitata was found more similar to Parnassia cacuminum rather than Parnassia yunnanensis, thus a new combination, Parnassia cacuminum var. longistipitata comb. nov. was proposed. Furthermore, other three names (Parnassia vevusta, Parnassia degeensis and Parnassia kangdingensis) were reduced to synonyms of Parnassia cacuminum too.