Small bogland orchid with solid bulbous and coralloid roots. =Anther= 1. =Labellum= shoe-shaped, saccate, 2-parted at the apex. =Sepals= and =petals= free, similar in texture. =Flowers= 1, large, terminal pendulous, bracted, resembling a Lady’s Slipper (_Cypripedium_). Linnæus wrongly designated this species _Cypripedium bulbosum_ in 1753. =Stem= or =scape= 3-6 inches high. =Leaf= 1, hyemal, appearing as an autumnal leaf about September 2d,[86] sheathed above by 2-3 scales. =Anther= lid-like below the summit of column. =Pollinia= 2, 2-parted, without caudicles, waxy, sessile, on a thick gland. =Seed-capsule= about ½ inch long, many-nerved. _Continental Range_—From Alaska, Labrador, southward, to Middlebury, Vermont, and doubtfully reported for Pelham, Massachusetts; westward to California and New Mexico. First collected in the United States in the State of Vermont, at Charleston and Morgan by the botanist Carey, who resided at Bellows Falls in 1831-1833. A monotypic species ranging in cooler portions of north temperate zone, in Europe, Asia, and North America, assuming slight varietal changes in different regions. North American species 1 New England species 1 Hoosac Valley species 0 New England species: 1. _C. bulbosa_ (Linnæus) Oakes, 1753-1842. 1.—CALYPSO BULBOSA (Linnæus) Oakes, 1753-1842[87] BEAUTIFUL CALYPSO—NORTHERN CALYPSO The specific name, _bulbosa_, refers to the bulbous root of this species, which was originally confounded by Linnæus in 1753 as a bulbous _Cypripedium_, and later placed under its generic designation _Calypso_ by Salisbury in 1807. Small sphagnous bogland or _conifer_ woodland orchid, with bulbous and coralloid roots. April 19th-May 3d-June 15th-July 12th. =Flowers= terminal, variegated with purple-pink, yellow, or white; shoe-shaped or saccate, resembling a Lady’s Slipper, with which genus it was confused by Linnæus in 1753. =Labellum= large, saccate or shoe-shaped pink-purple, 2-parted at apex, with patch of yellow (or white) woolly hairs near the point of division, spreading. =Sepals= and =petals= free, similar in texture. =Stem= or =scape= 3-6 inches high. =Leaf= 1, autumnal, appearing about September 2d, hyemal, basal, sheathed above by 2-3 scales. =Seed-capsule= ½ inch long, many-nerved. _Continental Range_—From Sitka, Alaska, Labrador, southward to Middlebury, Vermont, and possibly as far south as Pelham, Massachusetts; westward to Humboldt Bay, mouth of Russian River, California, and northeastern New Mexico. First collected in the United States in Vermont by the botanist Carey in 1831-1833. The Rocky Mountain _Calypso_ appears to be distinguished from the eastern _Calypso_ by producing a beard of white instead of yellow hairs at the point of division of the labellum. This varietal form is designated _Calypso occidentalis_ (Holzinger) Heller.