What were our teeny tiny mystery seeds from two weeks ago?

Those are portulaca or moss rose seeds, Portulaca grandiflora.

Moss rose flowers get their name from the fact they resemble old-fashioned roses. They come in a vibrant assortment of colors.

The plants are also sometimes called moss-rose purslane, and other members of the genus Portulaca are also called purslane. They have similar fleshy, succulent-looking leaves.

Moss roses are originally from South America.

Portulacas are small, hardy annuals that stand up well to dry conditions. The only problem we have with them is that the birds love to eat them.

Have you ever grown portulacas?