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. 2017 Apr 26;8:590. doi: 10.3389/fpls.2017.00590

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Copyright © 2017 Habib, Dang, Ickert-Bond, Zhang, Lu, Wen and Chen.

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) or licensor 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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Simplified ML cladogram showing major evolutionary lineages within Tetrastigma, with seed morphology indicated for representative taxa. Outgroup, Causonis japonica (Thunb.) Raf.; clade I, Tetrastigma sp. nov. Wen 12026; clade II, T. pedunculare Planch.; clade III, T. campylocarpum Planch.; clade IV, T. obtectum (Wall. ex M.A. Lawson) Planch. ex Franch.; clade V, T. rumicispermum (M.A. Lawson) Planch.; clade VI, T. cruciatum W. G. Craib and Gagnep. SL, seed length; SCL, seed cross length; Vi, ventral infold; Vis, ventral infolds. Significant morphological characters are indicated on the branches using vertical bars and character number and state were shown above and below the bar, respectively. Number of taxa with seed morphology observed in each clade is indicated below the clade name. Dorsal, ventral and cross-sectional views are shown from left to right. Seed illustrations were drawn by Ai-Li Li.