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. 2019 Aug 22;10:1037. doi: 10.3389/fpls.2019.01037

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Copyright © 2019 Wang, Lu, Zhang, Mao and Ge

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(s) 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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Scatter plots of bulliform phytolith sizes as defined by VL and HL for studied species versus different environmental variables. Mean VL values vs. observed MP7 values (A); mean HL values vs. observed MP7 values (B); mean VL values vs. observed MT7 values (C); mean HL values vs. observed MT7 values (D); mean VL values vs. observed MP1 values (E); mean HL values vs. observed MP1 values (F); mean VL values vs. altitude values (G); mean HL values vs. altitude values (H). Linear regression analysis of these data indicates no significant correlation.