Spatholirion cucphuongense (Commelinaceae), a new species from Cuc Phuong National Park in North Vietnam Author Lin, Che-Wei 0000-0002-8564-5793 Herbarium of Taiwan Forestry Research Institute, Taiwan Forestry Research Institute, No. 53, Nan-Hai Road, Taipei 10066, Taiwan & varalba @ gmail. com; https: // orcid. org / 0000 - 0002 - 8564 - 5793 varalba@gmail.com Author Peng, Ching-I 0000-0002-9175-1146 Herbarium (HAST), Biodiversity Research Center, Academia Sinica, Nangang, Taipei 115, Taiwan & bopeng @ gate. sinica. edu. tw; https: // orcid. org / 0000 - 0002 - 9175 - 1146 bopeng@gate.sinica.edu.tw Author Nguyen, Hieu Quang 0000-0002-5936-2319 Center for Plant Conservation (CPC), Vietnam Union of Science and Technology Associations, № 25 / 32, lane 191, L ạc Long Quân Rd, Nghia Dô, Cau Giay district, Ha Noi, Vietnam & hieu. nguyen @ cpcvn. org; https: // orcid. org / 0000 - 0002 - 5936 - 2319 hieu.nguyen@cpcvn.org Author Nguyen, Tien Hiep 0000-0001-5841-9099 Center for Plant Conservation (CPC), Vietnam Union of Science and Technology Associations, № 25 / 32, lane 191, L ạc Long Quân Rd, Nghia Dô, Cau Giay district, Ha Noi, Vietnam & centerforplantconservation @ gmail. com; https: // orcid. org / 0000 - 0001 - 5841 - 9099 centerforplantconservation@gmail.com Author Kono, Yoshiko 0000-0001-8813-6268 Herbarium (HAST), Biodiversity Research Center, Academia Sinica, Nangang, Taipei 115, Taiwan & ykono 5196 @ goo. jp; https: // orcid. org / 0000 - 0001 - 8813 - 6268 ykono5196@goo.jp text Phytotaxa 2023 2023-07-26 606 1 54 62 http://dx.doi.org/10.11646/phytotaxa.606.1.5 journal article 59768 10.11646/phytotaxa.606.1.5 f041ba79-3819-4502-9e5d-df8287bafeb6 1179-3163 8202341 Key to Spatholirion species in Vietnam 1a. Stem suberect, climbing or scandent, up to 300 cm ; inflorescence axillary ......................................................................................2 1b. Stem erect, up to 10 cm ; inflorescence terminal ................................................................................................... S. cucphuongense 2a. Suberect or ascending herbs ...................................................................................................................................... S. puluongense 2b. Climbing or scandent herbs ................................................................................................................................................................3 3a. Leaf blade lanceolate or ovate-lanceolate; ovary glabrous ......................................................................................... S. longifolium 3b. Leaf blade broadly oblong or broadly lanceolate; ovary densely hirsute........................................................................... S. elegans