Look - not even 2 inches tall and 3 inches wide. I placed a bottle cap in there to compare the size. I think it's a Pia. I forgot all about this, as I planted it in a 'neglected' section last spring. It got covered by another plant. I got it off ebay and it was so microscopic when I received it and did not expect much from it.
Anyway, I may have to transfer it to a pot or container.