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| Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen, in V. C. Nguyen, Tran, Truong, Averyanov, T. H. Nguyen, Phan-Thi et Tram, 2026. |
Abstract
A new species, Breynia phuongiana (Phyllanthaceae subgen. Sauropus), is described and illustrated from the Central Highlands of Vietnam. It is morphologically similar to B. beillei, B. bonii, and B. thorelii, but differs in having oblong-elliptic leaves, sepals marked with reddish striations, an androphore exceeding 1 mm in length, and distinctly hexagonal, starfish-shaped fruits with erect and persistent stigmas. A detailed morphological comparison with related species is provided. A preliminary conservation assessment categorizes it as ‘Data Deficient' (DD) based on IUCN Red List criteria.
Keywords: Breynia, Flora of Vietnam, plant diversity, plant endemism, taxonomy
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| Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen (A) A plant with inflorescences and infructescences, (B) stipules, (C) leaf from different views: adaxial (upper), abaxial (lower), (D) staminate flower from different views, (E) pistillate flower from different views, (F) inflorescences and infructescences, (G) fruit, (H) open fruit and seeds. Drawing from type specimens by Thanh Nha Phan-Thi. |
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| Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen (A) Flowering plant in its habitat, (B) inflorescence, (C–D) a staminate flower, (E) flowers from different views; a pistillate flower (left) and a staminate flower (right), (F) fruit with erect stigmas. All photos from holotype specimen AL2456 by Van Canh Nguyen, correction and design by Ba Vuong Truong. |
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| Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen (A) Leaves and branches, (B) inflorescences, (C) stipules, (D) portion of inflorescence, (E) staminate flower from different views: (1–4) adaxial surface, (5) abaxial surface, (F) pistillate flower from different views, (G) longitudinal section through the pistil and pedicel. All from holotype specimen AL2456 by Van Canh Nguyen, correction and design by Ba Vuong Truong. |
Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen sp. nov.
Diagnosis: The species is characterized by a combination of the following features: cauliflorous inflorescences and infructescences arising near the ground, sepals with reddish striations, an androphore more than 1 mm long, and distinctly hexagonal, starfish-shaped fruits with erect and persistent stigmas.
Etymology: The species name honours Ms. Ha Thi Phuong (Hà Thị Phương), who first discovered the species.
Van Canh Nguyen, Thi Thuy Nhan Tran, Ba Vuong Truong, Leonid V. Averyanov, Thi Hoa Nguyen, Thanh Nha Phan-Thi and Nguyen-Khanh-Trinh Tram. 2026. Breynia phuongiana (Phyllanthaceae), A New Species from the Central Highlands of Vietnam. Nordic Journal of Botany. DOI: doi.org/10.1002/njb.05025 [21 March 2026]
