My wife was given some seeds and was told that the seeds were "4 o'clock" flowers. However, these seeds do not match any description of "4 o'clock" seeds I have found. These particular seeds are large(1/8th" to 3/16th" diameter), silver/gray in color, hard and round. They look like tiny,gray peaches. I planted them this spring and the plant itself has multiple stems with long narrow leaves surrounding each stem. No buds or blooms have appeared yet. Can you help with I.D.? Also, I don't have any seeds left or a digital camera to take a photo. Sorry.
Possibly Mirabilis jalapa from Peru. A google search will give you the answer.