Two new species of Sonerila Roxb. (Melastomataceae) from Laos

Phongphayboun Phonepaseuth,Thyraphon Vongthavone,Keooudone Souvannakhoummane,Phetlasy Souladeth,Shuichiro Tagane

doi:10.5852/ejt.2021.755.1403

Phongphayboun Phonepaseuth, Thyraphon Vongthavone + Show 3 more

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https://doi.org/10.5852/ejt.2021.755.1403

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Abstract

Two new species of Sonerila Roxb. (Melastomataceae), S. erectifolia Phonep., Soulad. & Tagane sp. nov. from southern Laos, and S. souvannii Phonep. & Soulad. sp. nov. from central Laos, are described and illustrated. Comparisons with morphologically similar species are presented, along with ecological information and preliminary conservation status. A key to the species of Sonerila in Laos is also provided.

Highlights

Sonerila Roxb. is a large plant genus in the family Melastomataceae Juss. consisting of about 180 accepted species (POWO 2020)
PHONEPASEUTH P. et al, Two new species of Sonerila (Melastomataceae) from Laos ten species. This number has since risen to 15, with 11 species recognised in Vietnam (Ho 2003; Dang et al 2016), six in Cambodia (Hansen 1989; Chen & Renner 2001; Cho et al 2015; Shin et al 2020), and seven in Laos, namely, S. bolavenensis Soulad., Tagane & Suddee, S. lecomtei Guillaumin, S. neodriessenioides C.Hansen, S. plagiocardia Diels, S. tenera Royle, S. vatphouensis Munzinger & C.V.Martin, and S. yunnanensis Jeffrey ex W.W.Sm. (Newman et al 2017 onwards; Souladeth et al 2021)
Sonerila erectifolia sp. nov. is similar to Sonerila violifolia in its scorpioid or subumbelliform inflorescence, but it differs in the length of stem, European Journal of Taxonomy 755: 136–148 (2021)

Summary

Introduction

Sonerila Roxb. is a large plant genus in the family Melastomataceae Juss. consisting of about 180 accepted species (POWO 2020). The most recent taxonomic treatment of Sonerila in Indochinese region is provided by the Flore générale de l’Indo-Chine (Guillaumin 1913), which included. PHONEPASEUTH P. et al, Two new species of Sonerila (Melastomataceae) from Laos ten species. This number has since risen to 15, with 11 species recognised in Vietnam (Ho 2003; Dang et al 2016), six in Cambodia (Hansen 1989; Chen & Renner 2001; Cho et al 2015; Shin et al 2020), and seven in Laos, namely, S. bolavenensis Soulad., Tagane & Suddee, S. lecomtei Guillaumin, S. neodriessenioides C.Hansen, S. plagiocardia Diels, S. tenera Royle, S. vatphouensis Munzinger & C.V.Martin, and S. yunnanensis Jeffrey ex W.W.Sm. In other countries of the region, seven species have been found in China (Chen & Renner 2001; Lin 2015) and 15 in Thailand (Renner et al 2001; Sae Wai & Hu 2020)

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