Ceratostema ferreyrae.  A: habit.  B: close-up of undersurface of leaf auricle.  C: calyx, pedicel, and bracteole.  D: corolla.  E: stamens, front and lateral views, with inset of dehiscence clefts (from Ferreyra 18279, type).  Redrawn from the J. of the Arnold Arboretum 67: 488, fig. 1.  1986.