The structure of the "Banksia" flower, with the style end functioning as a pollen presenter, suggests that autogamous self-fertilisation must be common. In many "Banksia" species, the risk of this occurring is reduced by protandry: a delay in a flower's receptivity to pollen until after its own pollen has lost its viability. There is dispute, however, over whether this occurs in "B. prionotes": one study claimed to have confirmed "protandrous development", yet recorded high levels of stigmatic receptivity immediately after anthesis, and long pollen viability, observations that are not consistent with protandry.