ARPHA Preprints, doi: 10.3897/arphapreprints.e73692

Isotrema putalengense, a new species of Aristolochiaceae from northern Vietnam and two new combinations in Isotrema

Quoc Binh Nguyen^‡, Hieu Cuong Nguyen^§, Duc Binh Tran^|, Phuong Hanh Nguyen^|, Hong Truong Luu^¶#

‡ Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, Hanoi, Vietnam§ Southern Institute of Ecology, Vietnam Academy of Science and Technology, Ho Chi Minh, Vietnam| Institute of Ecology and Biological Resource, Vietnam Academy of Science and Technology, Hanoi, Vietnam¶ Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam# Southern Institute of Ecology Vietnam Academy of Science and Technology, Ho Chi Minh, Vietnam

Corresponding author: Quoc Binh Nguyen ( binhzing@gmail.com )

Corresponding author: Hong Truong Luu ( hongtruongluu@gmail.com )

This is an open access preprint distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Citation: Nguyen QB, Nguyen HC, Tran DB, Nguyen PH, Luu HT (2021) Isotrema putalengense, a new species of Aristolochiaceae from northern Vietnam and two new combinations in Isotrema. ARPHA Preprints. https://doi.org/10.3897/arphapreprints.e73692

Abstract

Isotrema putalengense Luu, Q.B.Nguyen & H.C.Nguyen is described as a new species from northern Vietnam. It looks most morphologically like I. wardianum but is distinguishable by a combination of different leafy and floral characters. Morphological comparison between the new plant and closest species is provided. In addition, combinations of two recently described Aristolochia species are made, namely Isotrema vuquangense (T.V.Do) Luu, Q.B.Nguyen & H.C.Nguyen and Isotrema yachangense (B.G.Huang, Yan Liu & Y.S.Huang) Luu, Q.B.Nguyen & H.C.Nguyen.

Keywords

Aristolochia subgenus Siphisia, combination, Isotrema, new species, Vietnam