Sonerila
Creators: name: Phonepaseuth, Phongphayboun
name: Souladeth, Phetlasy
name: Souvannakhoummane, Keooudone
name: Vongthavone, Thyraphon
name: Tagane, Shuichiro
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Myrtales
Melastomataceae
Sonerila

description: Key to the species of Sonerila in Laos
1. Acaulescent herb without evident erect stems above ground or with a very short rhizomatous stem; leaves forming a rosette .................................................................................................................... 6
– Caulescent herb with evident stems above ground; leaves distributed along the stem or branchlets ........................................................................................................................................................... 2
2. Opposite leaves on stems isomorphic; lamina linear to elliptic-oblong, less than 3 cm long, acute, cuneate to attenuate at base ............................................................................................................... 3
– Opposite leaves on stems dimorphic; lamina ovate, more than 3 cm long, cordate to rounded at base ................................................................................................................................................... 4
3. Stem and branchlets glandular-pilose or puberulous; lamina setose on both surfaces ........................ ................................................................................................................................ 7. S. tenera Royle
– Stem and branchlets glabrous; lamina glabrous to glabrescent on both surfaces ................................ ....................................................................................................... 4. S. neodriessenioides C.Hansen
4. Petiole glabrous, succulent and winged ........................................................ 5. S. plagiocardia Diels
– Petiole hairy, not winged .................................................................................................................. 5
5. Lamina glabrous except veins abaxially, margin glabrous; petiole 0.3–1.2 cm long .......................... .................................................................................................................... 3. S. lecomtei Guillaumin
– Lamina covered with long brown hairs, margin ciliate; petiole (0.6–) 1–3.5 cm long ........................ ................................................................................................9. S. yunnanensis Jeffrey ex W.W.Sm.
6. Lamina less than 1.4 cm long; inflorescence 1-flowered .................................................................... .....................................................................................1. S. bolavenensis Soulad., Tagane & Suddee
– Lamina more than 3 cm long; inflorescence 2- to many-flowered ................................................... 7
7. Lamina elliptic-oblong, ovate-elliptic, base acute, cuneate to attenuate; hypanthium 8–9 mm long ...........................................................................2. S. erectifolia Phonep., Soulad. & Tagane sp. nov.
– Lamina ovate to rounded, base cordate; hypanthium less than 6 mm long ...................................... 8
8. Lateral primary veins 3 pairs; inflorescence 2–3-flowered; hypanthium glabrous ............................. ...................................................................................... 8. S. vatphouensis Munzinger & C.V.Martin
– Lateral primary veins 4–5 pairs; inflorescence 20–25-flowered; hypanthium sparsely covered with villous hairs .................................................................... 6. S. souvannii Phonep. & Soulad. sp. nov.
description: Published as part of Phonepaseuth, Phongphayboun, Souladeth, Phetlasy, Souvannakhoummane, Keooudone, Vongthavone, Thyraphon & Tagane, Shuichiro, 2021, Two new species of Sonerila Roxb. (Melastomataceae) from Laos, pp. 136-148 in European Journal of Taxonomy 755 on page 146, DOI: 10.5852/ejt.2021.755.1403, http://zenodo.org/record/5012980