This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
A low perennial glabrous herb, with a decumbent leafy base, petioled evergreen crenu-late leaves, opposite, or verticillate in 3's, and a solitary drooping white or pink flower at the summit of a slender scape. Calyx 4-5 parted, persistent. Petals 4 or 5, spreading, broadly ovate or orbicular, sessile. Stamens 8 or 10, similar to those of Pyrola. Disk obsolete. Ovary globose, 4-5-celled; style straight, club-shaped at the summit; stigma 4-5-lobed; ovules very numerous in each cavity. Capsule subglobose, 4-5-lobed, 4-5-celled, loculicidally 4-5-valved from the summit, the valves glabrous on the margins. Seeds numerous, minute, the testa reticulated, produced at each end. [Greek, single-delight, from the single flower.]
A monotypic genus of the cooler parts of the northern hemisphere.
Pyrola uniflora L. Sp. Pl. 397. 1753.
Moneses grandiflora S. F. Gray, Arr. Brit. Pl. 2: 403. 1821.
Moneses uniflora A. Gray, Man. 273. 1848.
Stem bearing 1-3 pairs or whorls of leaves at the base, continued above into a bracted or naked scape 2'-6' high. Blades orbicular or ovate, obtuse at the apex, narrowed, rounded or sometimes subcordate at the base, rather thin, 4"-12" long, longer than or equalling their petioles; flower fragrant, 6"-10" broad; calyx-lobes ovate, obtuse, about one-fifth the length of the petals; capsule erect, 3"-4" in diameter, about as long as the persistent style and conspicuously lobed stigma.
In woods, Labrador to Alaska, south to Connecticut, Pennsylvania, Michigan, in the Rocky Mountains to Colorado and to Oregon. Ascends to 4600 ft. in the Adirondacks. Also in Europe and Asia. June-Aug.