Modes of self-pollination and absence of cryptic self-incompatibility in Drosophyllum lusitanicum (Droseraceae)

We show experimentally that several types of selfing occur simultaneously i n Drosophyllum lusitanicum: prior, competitive, insect-facilitated, delayed and geitonogamous. In addition, we report evidence of cleistogamy in the f lower bud. All types of selfing were successful in producing fruits and see ds; however, geitonogamy did not occur uniformly throughout the flowering p eriod in this species. We also report the absence of cryptic self-incompati bility: the germination rate and pollen tube growth rate of cross pollen we re no greater than those of self pollen when both types were placed on stig mas of the same flower (mixed pollination). There was a tendency for self p ollen to be more vigorous than cross pollen but it just failed to reach sig nificance.