Hi & welcome! Your plants are gorgeous! TY for sharing your awesome pics!
Your 1st & 3rd pics are Portulaca umbraticola. Not a true annual, though you may not be far enough south for it to survive perenially.
Wingpod Purslane (Portulaca umbraticola)
The 2nd pic is P. grandiflora. I suspect that's not a true annual either but haven't gathered enough evidence to be sure.
Moss Rose (Portulaca grandiflora)
The last pic looks like P. amilis. A perennial that is more hardy and survives over winter here, so yours should also.
Paraguayan Purslane (Portulaca amilis)
Purslane traditionally refers to P. oleracea.
Common Purslane (Portulaca oleracea)
But a couple decades ago, P. umbraticola was incorrectly introduced in commerce in the US as a cultivar of P. oleracea and that nickname is now quite confused.
http://australianportulaca.blo...
There are cultivars of P. oleracea developed for nutritional/culinary/palatability attributes, but not in regard to ornamental blooms.
