Scanning electron micrographs of lower epidermis. A–D Tashiroea clade, showing presence of furrowed surface sculpture: A T. amoena (Y. Liu 571) B T. nudipes (Y. Liu 435) C T. villosa (Y. Liu 568) D T. yaeyamensis (Y. Liu 631) E–L Bredia clade, showing absence of furrowed surface sculpture E B. dulanica (Y. Liu 565) F B. gibba (Y. Liu 566) G B. gracilis (Y. Liu 457) H B. hirsuta (Y. Liu 563) I B. longiradiosa var. pulchella (Y. Liu 485) J B. repens (Y. Liu 558) K B. tuberculata (Y. Liu 629) L B. yunnanensis (Y. Liu 627). Scale bars: 100 μm.