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The common milkwort (Polygala vulgaris) belongs to Polygalaceae (the Milkwort family). It is an evergreen shrub that is widespread in Europe, in Asia up to Japan and in the part of United States (Oregon and Michigan). This shrub grows in meadows, slopes, forest edges, and it can reach 7-35 cm in height. The stems have many branches and are woody at the base. The basal leaves are spatulate, with rounded apex, while the upper leaves are lanceolate. The blue to violet flowers bloom from May to June. The corolla is usually blue, occasionally bluish violet, rose-red or white, fused at base, tubular, and 3-lobed. The uppermost lobes round-tipped, lowest keel-like, many-lobed at tip. The sepals are five. The internal two are large, petaloid, net-veined, and the outer three are bluish-green, short, narrow.
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