First, here is how I'm collecting seeds:
The thread "How to Propagate Purslane" in
Purslane and Portulaca forum
And here is Charleen's wild pink purslane. I've never heard of wild purslane having pink blooms so it may be an ornamental variety that a bird left for her. It has a different leaf...longer, than the pink I have and the blooms are very small in comparison to mine too. I'm a little bit stumped!