Love-in-a-Puff (Cardiospermum halicacabum) is a curious climbing vine which will grow in most of the US (up to USDA zone 8b) and indeed much of the world where it doesn't get too cold. It's fairly invasive, but not exceptionally offensive. What's interesting about it besides the name is the seed pods, which look sort of like an empty tomatillo, or in essence a puff of plant with three seeds rattling around inside. The puffs can be picked off the plants intact and with seeds rattling. They make small white flowers which bees don't seem to bother with much.

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