“…All morphological characteristics were observed under a dissecting microscope (Olympus SZ61, Tokyo, Japan), and descriptions were made following the terminology used in Wang et al (1998) . The relevant literature was consulted, including Xu et al (2011) , Qiu et al (2012) , Zhang et al (2013) , Han et al (2018) , Wen (2019) , Jiang et al (2020) , Qiu et al (2020) , Huang and Xin (2021) , in addition to those mentioned in the introduction. The images of type specimens available in virtual herbaria and databases, including RBGE ( https://data.rbge.org.uk/search/herbarium/ ), Kew Herbarium Catalogue ( http://apps.kew.org/herbcat/navigator.do ), MNHN ( https://www.mnhn.fr/en ), PE ( https://pe.ibcas.ac.cn/index.html ), and iPlant ( http://www.iplant.cn/ ) were also examined.…”