article · Zenodo (CERN European Organization for Nuclear Research) · 2025

Dalbergia (sect. Dalbergia) sect. Dalbergia

J. Dong, Kai-Wen Jiang, A. Biao, Nan Shu, Huiwen Huang, Zhu-Qiu Song, Bo Pan, Tie-Yao Tu, Shi-Jin Li

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Abstract

Key to Chinese species of Dalbergia sect. Dalbergia The type species of the genus Dalbergia, D. lanceolaria L. f., and its allies comprise section Dalbergia. This section was previously known as section Dalbergaria Prain (1905 [1904]: 85). However, according to Art. 22.2 of the International Code of Nomenclature for algae, fungi, and plants (ICN; Madrid Code, Turland et al. 2025), a name of a subdivision of a genus that includes the type of the adopted, legitimate name of the genus is not validly published unless its epithet repeats the generic name unaltered. Therefore, the sectional name Dalbergaria was not validly published and should not be used; instead, the autonym sect. Dalbergia should be adopted. This section, based on the treatments by Prain (1905 [1904]) and Thothathri (1987), as well as the species key by Li (2017), comprises ca. 16 species distributed in tropical and subtropical Asia, and has been supported as a monophyletic clade in phylogenetic studies 1,2 (Vatanparast et al. 2013, Sotuyo et al. 2022). Members of this section are characterized by their stamens in 5+5 diadelphous arrangement [except D. polyadelpha Prain (1905 [1904]: 84), stamens irregularly separated to incompletely 3–5-adelphous on upper part] and coriaceous pods. Currently, nine species of this section are known from China. A key to these species (mainly based on fruiting specimens) is provided below. 1. Climbers or scandent shrubs...............................................................................................................................................................2 -. Generally erect trees ...........................................................................................................................................................................3 2. Leaflets 15–25; panicle generally shorter than its subtending leaf; pods strongly thickened and spongy around seeds..................... ................................................................................................................................................... D. stipulacea Roxburgh (1832: 233) -. Leaflets 9–13; panicle generally longer than its subtending leaf; pods not thickened around seeds as above .................................... ............................................................................................................................................ D. volubilis Roxburgh (1798 [1805]: 48) 3. Leaflets acute to acuminate at apex....................................................................................................................................................4 -. Leaflets rounded, obtuse to retuse at apex..........................................................................................................................................5 4. Pods glabrous except for short stipe............................................................................................................................ D. polyadelpha -. Pods brown puberulent.................................................................................................... D. hainanensis Merrill & Chun (1934: 32) 5. Pods not reticulate opposite seeds ........................................................................................................................................ D. oliveri -. Pods ± reticulate opposite seeds .........................................................................................................................................................6 6. Pods inconspicuously reticulate opposite seeds .................................................................................................................................7 -. Pods obviously reticulate opposite seeds ...........................................................................................................................................8 7. Pods obviously thickened and raised around seeds....................................................................................................... D. nigrescens -. Pods not or slightly thickened and raised around seeds ................................................................................................... D. assamica 8. Leaflets 7– 113; mature seeds firmly attached to the inner wall of the pod’s seed chamber .................. D. hupeana Hance (1882: 5) -. Leaflets (7–)9–19; mature seeds separate from the inner surface of the pod’s seed chamber ..................................... D. lanceolaria Notes: — 1 Phylogenetic analyses by Vatanparast et al. (2013) and Sotuyo et al. (2022) did not place Dalbergia sericea within the Dalbergia sect. Dalbergia clade. Upon examining the voucher specimen (BANGLADESH. Chittagong, 25 April 1994, A. M. Huq & M. K. Mia 10336 [L]) used in their studies, we found it to be a misidentification. This specimen likely represents a species closely related to Dalbergia velutina Bentham (in Miquel 1852: 255), characterized by membranous pods containing elongate seeds. 2 Notably, phylogenetic analyses based on chloroplast genomes by Rather et al. (2025) placed D. obtusifolia Prain (1901 [1902]: 42) and D. mimosoides Franchet (1889: 187) within the Dalbergia sect. Dalbergia clade. However, this result may be based on misidentification of voucher specimens (vouchers not traced by the current authors) and conflicts with both morphological data (see Li 2017) and our unpublished molecular phylogenetic data. Therefore, their results are not recognized here. 3 Li (2017), in his key to species and species descriptions, stated the leaflet number of Dalbergia hupeana as 3–5. This should be corrected to 3–5-paired leaflets.

Cite this paper

APA 7

Dong, J., Jiang, K.-W., Biao, A., Shu, N., Huang, H., Song, Z.-Q., Pan, B., Tu, T.-Y., & Li, S.-J. (2025). Dalbergia (sect. Dalbergia) sect. Dalbergia. Zenodo (CERN European Organization for Nuclear Research). https://doi.org/10.5281/zenodo.18848386

MLA 9

Dong, J., et al. “Dalbergia (sect. Dalbergia) sect. Dalbergia.” Zenodo (CERN European Organization for Nuclear Research), 2025, https://doi.org/10.5281/zenodo.18848386.

Chicago

Dong, J., Kai-Wen Jiang, A. Biao, Nan Shu, Huiwen Huang, Zhu-Qiu Song, Bo Pan, Tie-Yao Tu, and Shi-Jin Li. 2025. “Dalbergia (sect. Dalbergia) sect. Dalbergia.” Zenodo (CERN European Organization for Nuclear Research). https://doi.org/10.5281/zenodo.18848386.

Harvard

Dong, J. et al. (2025) ‘Dalbergia (sect. Dalbergia) sect. Dalbergia’, Zenodo (CERN European Organization for Nuclear Research). Available at: https://doi.org/10.5281/zenodo.18848386.

BibTeX

@article{dong2025dalbergia,
  title = {{Dalbergia (sect. Dalbergia) sect. Dalbergia}},
  author = {Dong, J. and Jiang, Kai-Wen and Biao, A. and Shu, Nan and Huang, Huiwen and Song, Zhu-Qiu and Pan, Bo and Tu, Tie-Yao and Li, Shi-Jin},
  journal = {Zenodo (CERN European Organization for Nuclear Research)},
  year = {2025},
  doi = {10.5281/zenodo.18848386}
}

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