Ceratostema bracteolatum.  A: habit.  B: flower showing large bracteoles at base of calyx.  C: calyx with bracteole removed.  D: stamens, side, front, and back views, with close-up of dehiscence pores.  E: habit of immature berry showing persistent, clasping bracteoles (Harling & Stähl 26621, type).  Reproduced from Flora of Ecuador 54: 217, fig. 14.  1996.