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. 2018 Feb 9;9:142. doi: 10.3389/fpls.2018.00142

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Copyright © 2018 Yu, Randle, Lu, Wang, Yang, dePamphilis, Corlett and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Plants of the Phtheirospermum tenuisectum complex. (A–D) Morphological variation in Ph. tenuisectum: (A) dissected leaves with wide lobes, and (B) flowers with spreading lower-lip and entire calyx lobes from Kangding (population T6, see Figure 2 and Supplementary Table S1, hereafter); (C) yellow flower with drooping lower-lip and branched calyx lobes from Lijiang (T12); and (D) yellow flower with spreading lower-lip and branched calyx lobes (T2). (E,F) Phtheirospermum sp. 1 from Lijiang (D1 and D2): (E) a whole plant and habitat; (F) flowering branch. (G–I) Morphological variation in Phtheirospermum sp. 2: (G) a flowering plant, and (H) leaves/bracts and flower with long and entire calyx lobes from Batang (H7); and (I) leaves with linear lobes from Zhongdian (H2). (J,K) Ph. muliense: (J) plants and habitat; (K) vegetative branch.