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This species is accepted, and its native range is Thailand.

[KBu]

Suwanphakdee C et al. 2017. New species and a reinstatement in Peperomia (Piperaceae) from Thailand. Kew Bulletin 72:1. DOI 10.1007/S12225-016-9662-5

Conservation
Peperomia masuthoniana is un­common and found only in Doi Chiangdao, Chiang Mai province in northern Thailand. However, the populations are small and restricted to the protected area of Chiangdao wildlife sanctuary. We assess the new species with the provisional rating of Vulnerable (VU) and the category D1, according to IUCN (2011) criteria.
Distribution
Endemic to northern Thailand (Chiang Mai province).
Ecology
Epiphytic on pine and oak trees or epilithic in open areas or mountain summits at 1200 - 1500 m above sea level.
Morphology General Habit
Perennial herbs 10 - 16 cm high, erect, epiphytic or epilithic; stems forming a clump, 1 - 3mainstems with 5 - 7 branchlets; stolons present, with adven­titious roots on basal nodes; internodes 1.5 - 3cm long, with red spots or bands, fleshy, densely puberulent
Morphology Leaves
Leaves (3 -) 4-verticillate, rarely oppo­site; petiole 3 - 7 mm long, puberulous; lamina succulent and fleshy when fresh and subcoriaceous when dry, elliptic or oblong-elliptic rarely obovate, glabrous on upper surface and puberulous on lower surface; 1.5 - 2.5 x 0.7 - 1.4 cm, symmetrical, base cuneate, apex obtuse or retuse with short hairs, margin undulate, 1-veined (i.e midrib only)
Morphology Reproductive morphology Flowers
Flower with orbicular floral bract, c. 0.5 x 0.5 mm, covering the basal part of ovary
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens: filaments 0.2 - 0.3 mm long; anthers 0.1 - 0.2 mm long, exserted at anthesis, transversely dehiscent
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary ellipsoid; style short and beaked; stigma with hairs and caducous
Morphology Reproductive morphology Fruits
Fruit without pseudopedicel, sparse and immersed within rachial pit, ellipsoid, c. 0.8 x 0.5 mm diam, apex beaked and formed from style, fruit surface with sparse, rounded sticky papillae
Morphology Reproductive morphology Inflorescences
Inflorescence a single, terminal spike per shoot, 3 - 6 x0.1- 0.15 cm, erect, greenish-yellow, cylindrical, rachis glabrous, with sparse flowers; peduncle 0.5 - 1 cm long, puberulous
Note
Peperomia masuthoniana is most similar to P. heyneana but can be distinguished by the stem densely puberulent vs glabrous, puberulous or densely scabrous; (3 -) 4-verticillate rarely opposite vs opposite or 3 - 4-verticillate on terminal shoot; inflorescence 5 - 8 cm long vs 8 - 12 cm long; fruit apex beaked vs acute. The specific epithet honours Associate Prof. Sumon Masuthon (1952 - present), Department of Botany, Faculty of Science, Kasetsart University, who encouraged the first author to intensively study the family Piperaceae for the Flora of Thailand project. Peperomia masuthoniana is characterised by having (3 -) 4-verticillate leaves (rarely opposite). The stems are densely puberulent. The fruit is ellipsoid and the apex is beaked, formed from the style. The fruit surface has sparsely rounded papillae. A comparison of characters between P. masuthoniana and it most similar species, P. heyneana, is shown in Table 2.
Phenology
Flowering and fruiting occur between October and December.
Vernacular
Bia Chiang Dao.

Native to:

Thailand

Peperomia masuthoniana Suwanph. & Chantar. appears in other Kew resources:

First published in Kew Bull. 72(1)-1: 2 (2016)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

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Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0