<strong><em>Mouretia oblanceolata</em> (Rubiaceae), a new species from central Vietnam</strong>

Abstract

Mouretia oblanceolata, discovered in central Vietnam, is described as a new species of the tribe Argostemmateae in the family Rubiaceae. The new species is most similar to Mouretia tonkinensis and M. vietnamensis but differs from them by the following traits: erect to sub-erect habit, abaxially glabrous, obcordate stipules, oblanceolate leaves, 12–16 pairs of lateral veins, terminal, umbrella-like, cymose inflorescences, deltoid calyx lobes, and revolute, deltoid to ovate corolla lobes. The formal description, including color illustrations and basic information of ecology, phenology and conservation status, and a key to all currently known species of the genus are provided here.

Typification and novelties in Rubiaceae for the flora of Vietnam

“…(Yuan & Wang, 2020). (Anh et al, 2021b). This genus occurs from South China to the Northern parts of Thailand, Laos and Vietnam, and its representatives prefer to grow on soils or rocks along small streams or nearby waterfalls, usually in the understory layer of subtropical evergreen forests (Tange, 1997;Ho, 2003;Tran, 2005;Chen et al, 2011 andAnh et al, 2021b).…”