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. 2018 Jun 8;23(6):1393. doi: 10.3390/molecules23061393

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Neighbor Joining (NJ) tree based on the four combined chloroplast loci (matK, trnG, rbcL, trnH-psbA). The numbers on the branches indicate the support value of Maximum Likelihood (ML)/Bayesian Inference (BI)/NJ (>50%). The numbers following a species name represent the numbers of individuals. Cluster A represents Sect. Corydalis. Cluster B represents Sect. Duplotuber. The column bar indicates the putative species identified by Automatic Barcode Gap Discovery (ABGD) and Poisson tree process (PTP). Acute to acuminate nectary corresponds to Cluster A1. Obtuse nectary corresponds to Cluster A2 and A3.