Asarum pubitessellatum . A. Habit; B. Front view of flower; C. Perianth-tube; D. Dissected perianth tube, showing stamens and pistil; E. Part of perianth tube, showing tessellated inner surface; F. Stamens; G. Style and stigma; H. Trichomes on the inner surface of perianth tube. (from the holotype, C. T. Lu, 812 (TNU)).