Disterigma balslevii.  A: habit.  B: flower, with bracteoles concealing calyx base.  C: flower, with corolla removed and one bracteole detached.  D: longitudinal section of corolla showing position of stamens.  E: stamens, front and side views showing geniculate filaments.  F: portion of stem showing mature berry (from Luteyn et al. 8405, type).  Reproduced from Opera Botanica 92: 115, fig. 4.  1987.