Acknowledgement

We would like to express our gratitude to Dr. Yao-Chien Alex Chang from National Taiwan University for providing the plant materials of C. formosanum and Mr. Chih-Hsin Yeh from Taoyuan District Agricultural Research and Extension Station, Council of Agriculture, Executive Yuan for providing the plant materials of P. bellina, P. schilleriana, P. modesta, P. lueddemanniana, and G. elata. We also thank Dr. Cecilia Koo Botanic Conservation Center for providing the plant material of A. wallichii and N. zollingeri. Last but not least, we would like to thank Mr. Yi-Fu Wang and Mr. Chih-Hsin Yeh for providing the photos of N. zollingeri and P. bellina.