Ha Giang Province, Quan Ba District, clustering epiphyte on tree branches. 1 October 2020, Truong Ba Vuong, Ngo Quang Dang, BV 1289.
Species looks similar to P. yunnanensis in pure white color, but P. demissa has up to 8 flowers, while P. yunnanensis has 1-2 only. P. demissa has sepals keeled outside, apical part of petals ciliate to erose along margin.
Record creation: 2022-05-01, Аверьянов Леонид Владимирович. Processing status: work_status_1Citation: Specimen LE 01123092 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01123092