You can understand how easily the maple seeds inside these cases would be carried upon the breeze by their wings.

Each seed of the elm tree is winged nearly all the way round. The picture (Fig. [65]) shows you a cluster of these as they look upon the tree.

Fig. 65

Fig. 66

Here is a bunch of the long-winged seeds of the ash (Fig. [66]). Next comes a fruit cluster from the hop hornbeam (Fig. [67]), and above is a single fruit (Fig. [68]).

Fig. 67