Four new species of Gesneriaceae from Yunnan, southwest China, are described and illustrated. They are Petrocosmea rhombifolia, Petrocosmea tsaii, Didymocarpus brevipedunculatus, and Henckelia xinpingensis. Diagnostic characters between the new species and their morphologically close relatives are provided. Their distribution, ecology, phenology, and conservation status are also described.
Aristolochia
sinoburmanica Y.H.Tan & B.Yang, a new species of Aristolochiaceae from Putao, Kachin State, Myanmar, is described and illustrated. According to morphology (strongly curved perianth, 3-lobed limb, as well as 3-lobed gynostemium, anthers 6, adnate in 3 pairs to the base of gynostemium, opposite to the lobes), the species belongs to Aristolochia
subgenus
Siphisia. It is morphologically similar to A.
faviogonzalezii, A.
hainanensis, A.
tonkinensis, A.
saccata and A.
xuanlienensis. The major differences between them are outlined and discussed. A detailed description, along with line drawings, photographs, habitat, distribution and conservation status, as well as a comparison to morphologically similar species, are also provided.
In this study, we describe several new taxa belonging to the flora of Myanmar. One new family, Polyosmaceae (
Polyosma wallichii
Benn.) is recorded. Over ten new genera are recorded for the first time, including
Amentotaxus
Pilger (Taxaceae),
Hydrobryopsis
Engler (Podostemaceae),
Cyrtosia
Blume and
Biermannia
King & Pantling (Orchidaceae),
Eleutharrhena
Forman and
Haematocarpus
Miers (Menispermaceae),
Craigia
W.W. Smith & W.E. Evans (Malvaceae),
Amblyanthopsis
Mez (Primulaceae),
Huodendron
Rehder and
Rehderodendron
Hu (Styracaceae),
Platea
Blume (Metteniusaceae),
Achyrospermum
Blume (Lamiaceae),
Christisonia
Gardner (Orobanchaceae). In addition, five new species are described and illustrated:
Tupistra natmataungensis
Y.H. Tan & H.B. Ding,
Biermannia burmanica
Y.H. Tan & Bin Yang,
Impatiens megacalyx
Y.H. Tan & H.B. Ding,
Amblyanthopsis burmanica
Y.H. Tan & H.B. Ding,
Platea kachinensis
Y.H. Tan & H.B. Ding. The distribution, ecology, phenology, and conservation status of these new species are also described.
Two new species of Begonia L. (Begoniaceae), B. laotica (sect. Parvibegonia) and B. hypoleuca (sect. Reichenheimia), from north Laos are described and illustrated. Begonia augustinei, B. dryadis, B. lancangensis, B. sizemoreae and B. sillentensis subsp. mengyangensis were newly recorded taxa in Laos. Furthermore, an updated checklist of Begonia of Laos is also compiled.
Article impact statement: Species distribution pattern and connectivity change call for transboundary conservation on China's borders with Myanmar, Laos, and Vietnam.
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