Orthaea panamensis.  A: habit.  B: flower showing pedicel, bracteoles, calyx, style, and pubescence.  C: corolla opened up to show four adjacent stamens, note relative corolla/stamen length and alternately unequal staminal filaments.  D: alternate stamens in ventral view, note alternately unequal filaments and pubescence (from Mori & Kallunki 3602, type).  Redrawn from Brittonia 29(3): 262, fig. 2.  1977.