Aristolochia austroyunnanensis S. M. Hwang (family Aristolochiaceae), a species endemic to southern China, is newly recorded for the flora of Vietnam. This newly recorded species belong to subgenus Siphisia and is most similar to Aristolochia petelotii O. C. Schmidt and Aristolochia fangchi C. Wu ex L. D. Chow & S. M. Hwang. Detailed morphological descriptions and color illustrations, together with information on distribution, habitat, phenology, and taxonomic notes are given. An identification key to all known Siphisia species in Vietnam is also provided. | ACADEMIA JOURNAL OF BIOLOGY 2023 45 2 71 79 DOI 2615-9023 17557 Aristolochia austroyunnanensis S. M. Hwang A NEW RECORD FOR THE FLORA OF VIETNAM Pham Van The2 3 Trinh Ngoc Bon4 Le Thi Thanh Huong5 Do Van Truong1 1 Vietnam National Museum of Nature VAST Vietnam 2 Science and Technology Advanced Institute Van Lang University Ho Chi Minh Vietnam 3 School of Engineering and Technology Van Lang University Ho Chi Minh Vietnam 4 Silviculture Research Institute Vietnamese Academy of Forest Sciences Vietnam 5 Thai Nguyen University of Science Thai Nguyen Vietnam Received 5 October 2022 accepted 24 May 2023 ABSTRACT Aristolochia austroyunnanensis S. M. Hwang family Aristolochiaceae a species endemic to southern China is newly recorded for the flora of Vietnam. This newly recorded species belong to subgenus Siphisia and is most similar to Aristolochia petelotii O. C. Schmidt and Aristolochia fangchi C. Wu ex L. D. Chow amp S. M. Hwang. Detailed morphological descriptions and color illustrations together with information on distribution habitat phenology and taxonomic notes are given. An identification key to all known Siphisia species in Vietnam is also provided. Keywords Aristolochia Aristolochia austroyunnanensis new record Siphisia Vietnam. Citation Pham Van The Trinh Ngoc Bon Le Thi Thanh Huong Do Van Truong 2023. Aristolochia austroyunnanensis S. M. Hwang a new record for the flora of Vietnam. Academia Journal of Biology 45 2 71 79. https 2615-9023 17557 Corresponding author email dovantruong_bttn@ 2023 Vietnam Academy of Science and Technology VAST 71 Pham Van The et al. INTRODUCTION 2017 distinguished A. austroyunnanensis The genus Aristolochia Linnaeus 1753 from A. petelotii by the difference of sensu lato is the largest genus of family morphological characters of the lamina the Aristolochiaceae and is widely distributed inner surface of limb lobes as well as the color throughout the tropics subtropics and also of the throat. .
