William Beal - Seed Dispersal

I wonder if the engineers have not been studying the fruit of the bladder nut? But this is not all. Many of the dry nuts hang on all winter, or for a part of it, rattling in the wind, as though loath to leave. Some of them are torn loose, and in winter there will be a better chance than at any other time for the wind to do the seeds a favor, especially when there is snow on the ground, for then they will bound along before the breeze till something interrupts them.

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C. D. Lippincott believes that this is a provision of nature to dispose of the now unnecessary branchlets without leaving a knot. Plant World , Vol. I, p. 96.

The brittle branches of salix were noticed by the author in Bull. Torr. Bot. Club , Vol. IX (1883), p. 89.