Pyrola(redirected from Pirola)
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a genus of plants of the family Pyrolaceae. They are perennial grasses with creeping rhizomes. Their coriaceous leaves are located on the lower part of the stem. The flowers are pentamerous, and the corolla may be white, greenish, or reddish. The fruit is a pentagonal pod. There are about 40 species in the northern hemisphere, chiefly in temperate latitudes. In the USSR there are seven species, growing chiefly in the forest zone, in mossy coniferous and mixed forests. The most common species are Pyrola rotundifolia and Pyrola minor. The plants of this genus are sometimes grown for decoration in shady areas in parks and gardens.