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Issue: Vol. 736 No. 1: 24 Dec. 2025
Type: Article
Published: 2025-12-24
DOI: 10.11646/phytotaxa.736.1.6
Page range: 70-78
Abstract views: 144
PDF downloaded: 7

A new bulbil-bearing species of Arisaema sect. Anomala from Vietnam

Department of Ecology and Evolutionary Biology, University of Science, Vietnam National University - HCMC, Ho Chi Minh City, Vietnam; Vietnam National University - HCMC, Ho Chi Minh City, Vietnam
Southern Institute of Ecology, Green Development Solution Services Company Limited, Ho Chi Minh City, Vietnam
Southern Institute of Ecology, Green Development Solution Services Company Limited, Ho Chi Minh City, Vietnam
Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
Huongsang Environment and Biological Resources Co., Ltd., Da Nang City, Vietnam
Institute of Advanced Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
Institute of Advanced Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi City, Vietnam
Araceae bulbils endemic vegetative reproduction white spotted spathe Monocots

Abstract

A new species of Arisaema (Araceae), A. bulbilferum, is described from Ba Na – Nui Chua Nature Reserve, Da Nang City, Central Vietnam. The species belongs to section Anomala, characterized by its evergreen habit, rhizomatous stem, trifoliolate leaves, and spadix appendix densely covered with filiform neuter flowers. Arisaema bulbilferum is distinguished by its unique vegetative reproduction via bulbils formed at the apex of the petiole – an uncommon trait within the genus. It is morphologically similar to A. pingbianense but differs in rhizome length, peduncle-to-petiole ratio, petiole and peduncle color patterns, structure of sterile spadix’ appendix, ovary and fruit shape, and a distinctive white spot on the spathe that spreads from the base of the limb to the back of the tube. Conservation assessments classify A. bulbilferum as Endangered (EN) under IUCN criteria. With this discovery, section Anomala now comprises 14 species recorded in Vietnam, further confirming the region’s rich diversity of Arisaema. A key to all known species of Arisaema sect. Anomala in Vietnam is provided.

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How to Cite

Nguyen-Phi, N., Tran, N.T., Tran, H.D., Van, H.T., Pham, T.M., Nguyen-Le, X.B. & Luu, H.T. (2025) A new bulbil-bearing species of Arisaema sect. Anomala from Vietnam. Phytotaxa 736 (1): 70–78. https://doi.org/10.11646/phytotaxa.736.1.6