Pothos vietnamensis sp. nov. (Araceae–Pothoideae–Potheae) from Vietnam

Van Du Nguyen, Van Dinh Nguyen and Peter C. BoyceV.

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).

Pothos vietnamensis
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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