“…As now circumscribed, the genus is widely distributed, occurring from south-western, southern and eastern China southward to northern and central Vietnam (Wang et al One transfer to Primulina (Gesneriaceae) and amended descriptions for P. crassifolia and P. quanbaensis from northern Vietnam 1990, 1998, Möller et al 2016, Vu 2017, Xu et al 2017. In Vietnam, a total of 23 species have so far been recorded (Drake 1890, Merrill 1918, Pellegrin 1926, 1930, Burtt 1960, 2002, Wood 1972, Wang 1981b, 1983, Pham 1993, 2000, Nguyên and Kiew 2000, Vu 2005, Wang et al 2011, Weber et al 2011, Do et al 2013, Zhao et al 2013, Xu et al 2017, Luu et al 2018, Yang et al 2018.…”