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| Lysimachia brevicaulis Y.H. Tan & D.L. Quan, in Quan, Yang et Tan, 2025. |
Abstract
Lysimachia brevicaulis Y.H. Tan & D.L. Quan (Primulaceae) is described and illustrated as a new species from a limestone karst in Oudomxay Province, Laos. It is tentatively placed in the subgenus Idiophyton. The new species is morphologically close to L. verbascifolia but can be distinguished from it by its underdeveloped stem, smaller leaf blades, solitary flowers, villous calyx, abaxially reddish brown and puberulent corolla, shorter anthers and styles, and green fruits.
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| Lysimachia brevicaulis. — A: Habit (left, isotype; right, holotype). — B: Flowering plant. — C: Lateral viewwith rhizome. — D: Fruits (holotype). — E, G and H: Flower. — F: Pistil. — I: Leaves (left, adaxial surface; right, abaxial surface). — J: Petals detached. — K: Sepals detached. — L: Stamens. A and D photographed at the type locality on 19 November 2022; others photographed from paratype (HITBC0123823) in Xishuangbanna Tropical Botanical Garden on 14 June 2023. |
Lysimachia brevicaulis Y.H. Tan & D.L. Quan sp. nov.
Etymology: The specific epithet brevicaulis refers to the short stem, one of the key characteristics of the new species.
Dong-Li Quan, Bin Yang and Yun-Hong Tan. 2025. Lysimachia brevicaulis (Primulaceae), A New Species from Limestone Karst of Northern Laos. Annales Botanici Fennici. 62(1); 75-80. DOI: doi.org/10.5735/085.062.0112 (10 March 2025)
