[Botany • 2022] Rediscovery of Diospyros bambuseti (Ebenaceae) in Thailand: Emended Taxonomic Description, Lectotypification, and Phylogenetic Placement

  Diospyros bambuseti H.R.Fletcher. 

in Duangjai, Sinbumroong, Chalermwong, et al., 2022. 

มะเกลืออรัญ, บูน || DOI: 10.11646/phytotaxa.542.3.3 

Photographed by S. Duangjai and A. Sinbumroong 

Abstract

Diospyros bambuseti is a rare species endemic to Thailand that was previously known only from type specimens. The only male specimens of this species were collected in 1930 from a bamboo forest in Aranya Prathet district, now Sa Kaeo Province, Thailand. Both male and female plants were rediscovered in Surat Thani Province, upper Peninsular Thailand during 2015–2020. In this work, we provide an emended description, detailed ecological data, photographs, and illustrations of recently collected specimens. We performed lectotypification and investigated the phylogenetic placement and sister taxa of D. bambuseti based on the DNA sequences of eight plastid regions. D. bambuseti is closely related to D. ehretioides, D. fasiculosa, and D. venosa. Finally, we provide a detailed morphological comparison of D. bambuseti with related species.

Keywords: Eudicots, Diospyros, molecular phylogenetics, morphology, plastid DNA, Thailand

  Diospyros bambuseti H.R.Fletcher. Male flowers.  

 Diospyros bambuseti H.R.Fletcher.  Female flowers.

 Diospyros bambuseti H.R.Fletcher. Young fruits. 

Diospyros bambuseti H.R.Fletcher. Fruits and seeds.   

  Diospyros bambuseti H.R.Fletcher.
A. Fruiting branch habit. B. Leaves. C. Male flowers. D. Male flowers. E. Fruits and seeds.

 Scale bars: A–B and E = 2 cm; C–D = 5 mm. 

Drawn by W. Bhuchaisri 

from Chalermwong 22102018 (A–B and E), Sinbumroong et al. 300520151 (C), and Sinbumroong 22052020 (E).

มะเกลืออรัญ Diospyros bambuseti H.R. Fletcher

Diospyros bambuseti H. R. Fletcher, Bull. Misc. Inform. Kew 1937: 387;

Fl. Siam. En. 2: 364. 1938; Phengklai Fl. Thailand 2 (4): 290, Fig. 1. 1981.

Vernacular name:— Maklua aran - มะเกลืออรัญ (Sa Kaeo); boon - บูน (Surat Thani).

Distribution:— Endemic to Thailand, known only from Aranya Prathet district, Sa Kaeo Province and Khian Sa district, Surat Thaini Province.

 

   

 

Sutee Duangjai, Aroon Sinbumroong, Porntawat Chalermwong, Padungsak Suekaew and Somran Sddee. 2022. Rediscovery of Diospyros bambuseti (Ebenaceae) in Thailand: Emended Taxonomic Description, Lectotypification, and Phylogenetic Placement. Phytotaxa. 542(3); 271–282. DOI: 10.11646/phytotaxa.542.3.3 

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