Everyone loves orchids, and our gardens are chockablock full of all manner of daylilies, hostas, penstemons--you name it. But who cares about milkworts? Well...I do! If you Google image Polygala you will an astonishing range of treasures found throughout the Northern Hemisphere, with some of the most outlandish restricted in nature to South Africa. Only a very small number have made it securely into North Temperate gardens, notably the alpine Polygala chamaebuxus, which you may find in early summer in the Alps, usually in its yellow phase.
The lovely pink milkwort above is Polygala amoenissima, although I had a very similar plant once labeled P. amara--both originating in the Caucasus of Western Asia. This has proved to be a very vigorous, long lived plant in my rock gardens, producing a few welcome seedlings to expand the display. Its first flowers can appear in late April, and it continues to sport its little pink orchids through summer and into the fall: quite a display for any plant.