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Issue: Vol. 776 No. 2: 24 Sept. 2026
Type: Article
Published: 2026-09-24
DOI: 10.11646/phytotaxa.776.2.3
Page range: 166-172
Abstract views: 35
PDF downloaded: 12

Mitreola luongii (Loganiaceae), a new species from limestone hill in northern Vietnam

Japan Wildlife Research Center; 3-3-7 Kotobashi; Sumida-ku; Tokyo; 130-8606; Japan
Kagoshima University Museum; Kagoshima University; 1-21-30; Korimoto; Kagoshima 890-0065; Japan
Institute of Life Sciences; Vietnam Academy of Science and Technology; 85 Tran Quoc Toan Street; Xuan Hoa Ward; Ho Chi Minh City; Vietnam
Faculty of Forest Science; National University of Laos; Dongdok Campus; Xaythany District; Vientiane Capital; Laos
Association for Community Development (ACD); Salavan Province; Laos
Faculty of Forest Science; National University of Laos; Dongdok Campus; Xaythany District; Vientiane Capital; Laos
Faculty of Environmental Sciences; National University of Laos; Dongdok Campus; Xaythany District; Vientiane Capital; Laos; Department of Biological Sciences; Graduate School of Science; Tokyo Metropolitan University; 1-1 Minami-Osawa; Hachioji; Tokyo; 192-0397; Japan
Tokushima Prefectural Museum; Bunka-no-mori Park; Hachiman-cho; Tokushima 770-8070; Japan
Japan Wildlife Research Center; 3-3-7 Kotobashi; Sumida-ku; Tokyo; 130-8606; Japan; Graduate School of Science and Engineering; Kagoshima University; 1-21-35 Korimoto; Kagoshima; 890-0065; Japan
Dua Gia National Park; Minh Son Commune; Tuyen Quang Province; Vietnam
Institute of Life Sciences; Vietnam Academy of Science and Technology; 85 Tran Quoc Toan Street; Xuan Hoa Ward; Ho Chi Minh City; Vietnam
Eudicots Du Gia National Park flora Gentianales hornpods Indochina taxonomy

Abstract

A new species of Mitreola (Loganiaceae), M. luongii, is described from limestone area in Tuyen Quang Province, northern Vietnam. Morphologically, it is most similar to M. crystallina, but can be distinguished by its shrub habit, up to 1 m tall (vs. herb, up to 60 cm tall), having terminal and axillary inflorescences (vs. terminal), shorter internode 1.5–5.5 cm long (vs. 6–8 cm long), shorter peduncles 0.5–1.5 cm long (vs. ca. 6 cm long), smaller leaf size 5.5–10.5 × 2–4.5 cm (vs. 15–20 × 5–7 cm) and longer corolla tube 4–4.5 mm long (vs. 4 mm long).

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How to Cite

Moriwaki, H., Tagane, S., Pham, Q.T., Souladeth, P., Vongthavone, T., Kongxaisavath, D., Phonepaseuth, P., Naito, H., Yamazaki, K., Lenh, T.T. & Dang, V.-S. (2026) Mitreola luongii (Loganiaceae), a new species from limestone hill in northern Vietnam. Phytotaxa 776 (2): 166–172. https://doi.org/10.11646/phytotaxa.776.2.3