Lupine Are Coming Up All Overl

I stopped by today to check on the progress of the Scrub Lupine sprouting in the original planting area.
I wasn't disappointed.
I found several more sprouts. I have found 35 new sprouts in addition to what my friends at Bok Tower, who did the initial survey, came up with.
I found more seedlings outside of the expected area, leading me to wonder how do the seeds spread?
I have been told they are ejected some distance, but it seems there is another factor at work,.
I have seen the same thing in my yard with the neighbor's Orchid Tree (Bauhinia). It is known to eject seeds, but I find sprouts 40 feet away.
I'm left to wonder whether it's wildlife or humans (carrying seeds a short distance on the soles of our  .shoes or both.