Seed Dispersal

The text surveys the many ways plants spread, organizing material by mechanism: expansion by roots and stems, water-borne transport, wind dispersal, explosive release, and animal-aided movement. It describes specific devices such as runners and rooting branches, buoyant or air-filled fruits, winged or parachute-like seeds, twisting pods that eject contents, and burrs that attach to fur or clothing. Human activity and animal behaviors such as caching, digestion, and mud transport are treated as important vectors. Each chapter combines field observations, experiments, and illustrative examples, and a concluding discussion considers reasons for migration and points toward areas needing further study.