Updated description of Diospyrosdussaudii Lecomte (Ebenaceae), with lectotypification and notes on its distribution

Sutee Duangjai; Aroon Sinbumroong; Porntawat Chalermwong; Padungsak Suekaew; Kwanjai Khammongkol; Wittawat Kiewbang; Sukid Rueangruea; Theerawat Thananthaisong; Somran Suddee

doi:10.3897/phytokeys.184.71045

Updated description of Diospyrosdussaudii Lecomte (Ebenaceae), with lectotypification and notes on its distribution

PhytoKeys. 2021 Nov 4:184:67-82. doi: 10.3897/phytokeys.184.71045. eCollection 2021.

Authors

Sutee Duangjai¹, Aroon Sinbumroong², Porntawat Chalermwong³, Padungsak Suekaew², Kwanjai Khammongkol⁴, Wittawat Kiewbang⁵, Sukid Rueangruea⁶, Theerawat Thananthaisong⁶, Somran Suddee⁶

Affiliations

¹ Department of Forest Biology, Faculty of Forestry, Kasetsart University, Bangkok, 10900, Thailand.
² Protected Area Regional Office 4 (Surat Thani), Department of National Parks, Wildlife and Plant Conservation, Surat Thani, 84000, Thailand.
³ Surat Thani National Park and Protected Area Innovation Center, National Park Innovation Institute, Department of National Parks, Wildlife and Plant Conservation, Surat Thani, 84000, Thailand.
⁴ Phu Langka National Park, Department of National Parks, Wildlife and Plant Conservation, Nakhon Phanom, 48140, Thailand.
⁵ Forest Economics Bureau, Royal Forest Department, Bangkok 10900, Thailand.
⁶ Forest Herbarium (BKF), Department of National Parks, Wildlife and Plant Conservation, Bangkok, 10900, Thailand.

Abstract

Diospyrosdussaudii is a poorly known species and previous descriptions lacked details about its female flowers and fruits. The species had not been recorded since type collections were made in 1913. As a result of our Diospyros research in Thailand, new specimens and data are now available for this species. In this study, we provide an updated morphological description, illustrations, lectotypification and a distribution map. The species was previously reported to be endemic to Laos; as such, the occurrences in Thailand greatly expand the distribution of the species. In addition, we analysed the phylogenetic relationships between D.dussaudii and other Diospyros species from Southeast Asia and other regions, using DNA sequence data from eight plastid regions. Our phylogenetic analyses indicate that D.dussaudii is closely related to D.castanea, D.dasyphylla and D.insidiosa. Their taxonomic affinities are discussed.

Keywords: DNA sequence data; Dioecy; Diospyros.

Sutee Duangjai, Aroon Sinbumroong, Porntawat Chalermwong, Padungsak Suekaew, Kwanjai Khammongkol, Wittawat Kiewbang, Sukid Rueangruea, Theerawat Thananthaisong, Somran Suddee.