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| Polygonatum dabieshanensis B.X.Han, S.Y.Yi & X.W.Song, in Song, Xu, Wang, Han, Li et Yi, 2026. |
Abstract
Polygonatum dabieshanensis (Asparagaceae), a new species from the Dabieshan Mountains, Anhui and Henan provinces, China, is described and illustrated. It is most similar to P. praecox, P. cyrtonema, and P. odoratum but can be distinguished by having a yellow terete rhizome, a terete stem, elliptic leaf blades, racemose inflorescences, 1–2 (occasionally 3) flowers, a cylindrical perianth extending inwardly, filaments inserted near the distal 1/2 of the perianth tube that are smooth and glabrous, a white corolla, and blue-black berries, 0.8–1.0 cm in diameter, with 2–4 seeds. The complete chloroplast genome of the sampled individuals of this new species that we sequenced ranged from 155,107–155,108 bp in length. Our phylogenetic analyses, based on chloroplast sequences, confirm that the new species is distinct from morphologically similar species.
Key words: Asparagaceae, Dabieshan, Polygonatum dabieshanensis
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| Polygonatum dabieshanensis B.X.Han, S.Y.Yi & X.W.Song, sp. nov. A. Plants; B, C. Flowers; D. Inflorescence; E. Habitat. Photos by Tao Xu. |
Polygonatum dabieshanensis B.X.Han, S.Y.Yi & X.W.Song, sp. nov.
Diagnosis. The new species similar to P. praecox, P. cyrtonema, and P. odoratum. It differs from P. praecox in having a terete rhizome, white corolla, 2–4 seeds; differs from P. cyrtonema in having a terete rhizome, white corolla, filament cylindrical and extending inwardly, smooth, and glabrous, 2–4 seeds; differs from P. odoratum in having a yellow rhizome, upper part angled stem, 2–4 seeds.
Xiang-wen Song, Tao Xu, Wei Wang, Bang-xing Han, Guang-yan Li, Shan-yong Yi. 2026. Polygonatum dabieshanensis (Asparagaceae), A New Species from the Dabieshan Mountains, Anhui and Henan provinces, China. PhytoKeys. 269: 31-42. DOI: doi.org/10.3897/phytokeys.269.173145