The completion of the fifth volume of this Flora brings the pleasant task of dedicating it to the memory of my former teacher in systematic botany, the late professor doctor August Adriaan Pulle, of Utrecht University. As I have explained on a former occasion, descriptive botany and plant geography had since Miquel’s time lost a great deal of attention and recognition. It is largely due to Pulle that scientia amabilis in Holland owes its remarkable reveil.