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. 2018 Jul 18;13(7):e0199416.
doi: 10.1371/journal.pone.0199416. eCollection 2018.

New Saussurea (Asteraceae) species from Bogeda Mountain, eastern Tianshan, China, and inference of its evolutionary history and medical usage

Jie Chen  1 , Yu-Jin Wang  1
Affiliations

New Saussurea (Asteraceae) species from Bogeda Mountain, eastern Tianshan, China, and inference of its evolutionary history and medical usage

Jie Chen et al. PLoS One. .

Abstract

In this study, Saussurea bogedaensis Yu-J. Wang & Jie Chen, a new species from Bogeda Mountain in the eastern part of the Tianshan Mountains, is described and discussed based on evidence in terms of both morphological and genetic data. S. bogedaensis is morphologically similar to S. involucrata, which is distributed in the western part of the Tianshan Mountains, and it is well known because of its beauty, rarity, and medicinal value. The new species is also similar to S. orgaadayi, which is distributed in the nearby Altai Mountains. Our genetic data support the close relationships among these three species. According to their allopathic distributions, we suggest that these three species are derived from the same ancestor but that they differentiated after reaching their current range. In addition, we propose that the new species might serve as an alternative to S. involucrata in medicine due to their very high similarity. However, this species appears to be rare because we only found six mature individuals in the field despite extensive investigations.

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Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Map showing the locations visited to obtain samples of Saussurea bogedaensis, S. orgaadayi, and S. involucrata.
Fig 2
Fig 2. Saussurea bogedaensis in the wild.
Fig 3
Fig 3. Holotype of Saussurea bogedaensis (WYJ201607018).
(A) Living plant; (B) Floret; (C) Inner pappus bristle; (D, E, F) Anthers. (G) Style branches; (H, I) Phyllaries; (J) Stem leaf margin.
Fig 4
Fig 4
Comparison of materials from Saussurea orgaadayi (A, D), S. involucrata (B, E), and S. bogedaensis (C, F). (A, D) from WYJ201308041; (B, E) from WYJ201607025; (C, F) from WYJ201607018.
Fig 5
Fig 5. The 50% majority rule consensus tree derived from Bayesian analysis of the nuclear internal transcribed spacer.
Posterior probabilities (PPs) and bootstrap percentages (BPs) are indicated above and below the branches, respectively.
Fig 6
Fig 6. The 50% majority rule consensus tree derived from Bayesian analysis of the combined plastid dataset.
Posterior probabilities (PPs) and bootstrap percentages (BPs) are indicated above and below the branches, respectively.
See this image and copyright information in PMC

References

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