Tepuia venusta pollen (from Luteyn & Steyermark 9559).  A: pollen tetrad, polar view.  B: equatorial view.  C: close-up of exine (A & B bar = 10 µm;  C bar = 1 µm).  Redrawn from Flora Neotropica Monographs 66: 356, fig. 4A-C.  1995.