This little beauty has popped up here and there all around the garden and I had no idea where it had come from. Its a very pretty ferny foliage and is now showing some lovely yellow flowers. I have googled it and find that it is called Corydalis and is a genus of about 470 species of annual and perennial herbaceous plants in the Papaveraceae family, native to the temperate Northern Hemisphere and the high mountains of tropical eastern Africa. They are most diverse in China and the Himalayas, with at least 357 species in China. Wherever it has come from I like it. I had dismissed this plant as more of a pretty weed, the seeds of which had arrived either in wood chip or horse manure but on searching I find that it is a valued garden plant and indeed starred in a recent Gardeners World episode being planted by Monty Don. All the plants that have appeared in my garden are the yellow variety but I find that it also comes in white, pink and blue.