Macromorphology of Tryssophyton merumense (A–C, G–K) and T. quadrifolius (D–F). A habit, growing with bryophytes and downward pointing red buds B flowering plant, adaxial C Flowering plant showing bicoloured petals, abaxial D part of type collection in vivo just before pressing E whole leaf venation, abaxial F venation close-up showing major veins and reticulate quaternaries, abaxial G Dehisced 4-merous fruit, with interior persistent fimbriate placenta remnants (f), axial (tips of 8 triangular valves partly broken) H fruit, with seeds, fimbriae (f) and carpel septa, transverse view I whole leaf venation and crystal druses (white spots), adaxial J close-up of leaf tip with marginal teeth and non-vascularised scales (s), adaxial K phyllotactic arrangement with leaf attachment scars surrounded by darkened glandular trichomes, lateral view with main stem at bottom, peduncle at top. Sources: A–C, I–K Radosavljevic 165 D–F Wurdack 5865 G, H Wurdack 5870 (all US).