Q.I am interested in growing Purslane
For years I have grown Portulaca (Rose Moss). Is it the same or different? I noticed a plant growing in and around my driveway that looks like Purslane. Could it be from the Rose Moss seed dropping and is it edible?

Rose Moss and Portulaca Grandiflora are one and the same. Without a photograph, I am unable to tell you if the plant you are seeing in your driveway is Purslane (Portulaca Oleracea). Purslane is known as a prolific self seeder. Here is an article on the culinary aspects of purslane that may interest you:
https://web.extension.illinois.edu/cfiv/homeowners/030726.html
Happy gardening!