Shapes of trichomes on Astilbe uljinensis and Astilbe chinensis A, B, E, G A. uljinensis C, D, F A. chinensis. Abbreviations. BLN, Brownish Long Non-Glandular Hairs; WLN, Whitish Long Non-Glandular Hairs; WL, Whitish Long Glandular Hairs; WS, Whitish Short Glandular Hairs; BL, Brownish Long Glandular Hairs; BS, Brownish Short Glandular Hairs.