Gardens always have surprises up their sleeves. Many of those surprises are disappointing, such as perennials that don't come back or plants that refuse to bloom. 

But some surprises are delightful! Like this beautiful bright yellow flower that opened over the weekend.

This plant has been in my garden for at least a dozen years. I remember the day I bought it. I was shopping with my son, now 21, but a little boy at the time. I told him he could pick something out to plant in our garden, and he chose this plant, because he liked the sunny blooms.

I took it home, without even reading the tag, and we plopped it into the garden, where it bloomed for several years, then stopped. My theory was that it no longer got enough sun -- the maple tree we planted nearby is now huge and shades much of the garden.

But this year, it surprised me and burst into flower, with several buds to follow. The maple tree still shades the garden, so apparently this plant loved the polar vortex, or maybe it was the rainy June. 

Anybody recognize this plant? And what mystery survivors have you found in your garden?