Answer: If the flowers are funnel-shaped, they could be members of the Convolvulus (morningglory) family. These plants are quite vigorous and one member (C. arvensis, field bindweed) is considered a noxious weed in many states. All have arrowhead shaped leaves with flowers that open in the sunshine and close at night.
Flowers from members of the pea family generally have a lower lip and the leaves of the plants are long and narrow.
You might want to plant the seeds in containers until you're sure of their identity. If it's something you want to keep, you can transplant them into your garden.
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