Het geslacht Populus in verband met zijn beteekenis voor de houtteelt = The genus populus and its significance in silviculture

The genus Populus L. can be divided into 5 sections. This study deals with the classification and description of the species and varieties of the section Aigeiros Duby (black poplars), which contains almost all the important cultivated types in the Netherlands. The botanical information was supplemented by information on origin, distribution, possible origin from crosses, their Latin and popular names, and their cross fertility. Some data were given on the wood and its use, periods of flowering, budding and leaf fall and description of leaf prints. The data were compiled into a determinative key, a botanical and a geographical classification of the genus Populus L. and a table contrasting the features of important species of the section Aigeiros.
The culture of the poplar could be of greater value to the low-lying Netherlands. Wood production per tree could be much enlarged. Confused nomenclature often led to introduction of susceptible types. A plea was made for international control.