D. Nguyen, Inst. of Ecology and Biological Resources, Vietnam Acad. of Science and Technology, Hoang Quoc Viet, Nghia Do, Cau Giay, Hanoi, Vietnam. – V. D. Nguyen (vandu178@gmail.com), Dept of Biology and Agricultural Technology, Hanoi Pedagogical Univ., Xuan Hoa, Phuc Yen Town, Vinh Phuc Province. – P. C. Boyce, Dept Biologie I, Systematische Botanik und Mykologie, Ludwig Maximilians-Univ. München, München, Germany. PCB also at: Inst. for Tropical Biology and Conservation, Univ. Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia.
Pothos vietnamensis V. D. Nguyen & P. C. Boyce is described and illustrated from northern Vietnam as a new species of the Pothos supergroup, and it is compared with the two most similar species: P. kerrii and P. pilulifer to which P. vietnamensis is comparable by having a very small fertile portion (< 5 mm diameter) on the spadix. Ecology, habitat, population size and conservation status are also discussed.
Holotype: Lao Cai province, Van Ban district, Liem Phu Commune, 22°5′8.52″N, 104°3′5.44″E, ca 550 m a.s.l, 14 Sep 2009, Nguyen Van Du 401 (holotype: HN, K).
Figure 1. Pothos vietnamensis sp. nov. (A) plants in habitat, (B) older stems; note rough epidermis, (C) mature plant; note the lateral fertile stems, (D) flowering shoot with two post anthesis inflorescences. All from Nguyen Van Du 401. Photographs by Nguyen Van Du.
Nordic Journal of Botany 000: 001–005, 2017
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