The species name for this plant, peregrina, is peculiar since it is Latin for “foreign”, or “coming from a different country”. From which country was the taxonomist referring to?
It is native to the U.S., although only one subspecies. Another subspecies is of European origin (peregrina?) and is found around here, but that’s getting a little picky.
Neckweed, also called Purslane Speedwell, is common in lawns all across the U.S. It is almost unnoticeable in the grass. It is very short with tiny flowers. The plant is more erect than other similar Speedwells.