Polygala is a large genus of flowering plants belonging to the family Polygalaceae. They are commonly known as milkworts or snakeroots. The genus is distributed widely throughout much of the world in temperate zones and the tropics. The genus name Polygala comes from the ancient Greek “much milk”, as the plant was thought to increase milk yields in cattle. Polygala includes annual and perennial plants, shrubs, vines, and trees. The roots often have a scent reminiscent of wintergreen. The leaf blades are generally undivided and smooth-edged, and are alternately arranged in most species. The inflorescence is a raceme or spike-like array of several flowers; the occasional species bears solitary flowers.

Polygala fruticosa ‘Petite Butterfly’ (Sweet Pea Shrub) – A compact shrub to almost 3 feet tall with a rounded habit. It is has gray-green foliage that is slightly rounder than Polygala dalmaisiana. It is very free flowering with the purple pea-like flowers, composed of two winged petals surrounding a whitish purple lacy crest, found on the plant nearly year-round. Plant in full sun or part shade with regular to little irrigation. Hardy to 2 degrees below freezing. Polygala fruticosa is a coastal species that can even be found within the splash zone. This would make this a good candidate for beachside plantings. It also makes a good cut flower and lasts well in arrangements.