Robert Brown, as early as 1813, attempted to establish a distinct species in the American _Calypso_, from that of the European and Asiatic forms. He designated the North American form, _Calypso Americana_. Neither Lindley nor Hooker approved of this distinction, Hooker remarking that the species even in the same country may vary in structure or colors, but not permanently enough to designate it specifically. Smith, Richard and Lindley later agreed with Dr. Hooker in “considering the American, European and Asiatic _Calypso_ the same.” _Calypso bulbosa_ is the only species of this genus in the north temperate zone, and is nearly related to the section _Pleiones_ of genus _Cœlogyne_, meaning “two-lipped” or 2-parted at the apex of the labellum. _Cœlogyne_ is a native of Asia, and many of the closely allied _Pleiones_ are alpine-orchids, their large rose-colored or cream-colored flowers clinging to the branches of sturdy oaks at an altitude of 7500 feet in latitude 30° North. _Calypso_ also seeks the colder lands, of the _conifer_ forests of Alaska and Labrador, in latitude 54°-69° North; while in the Rocky Mountain region it is found at an elevation of 4000-5000 feet above sea level. _New England Range_—Maine, frequent; New Hampshire, infrequent; Vermont, frequent northward; Massachusetts, doubtfully reported. [Illustration: =Northern Calypso.= (_Calypso bulbosa._) “_Calypso, goddess of an ancient time,_ _(I learn it not from any Grecian rhyme._ _And yet the story I can vouch is true.)_ _Beneath a pine tree lost her dainty shoe._ _The goddess surely must have been in haste,_ _Like Daphne fleeing when Apollo chased,_ _And leaving here her slipper by the way,_ _Intends to find it on another day._” W. W. BAILEY. From lithograph in Meehan’s _Native Flowers and Ferns of the United States_, 1: 1878. By permission.] XII Corallorhiza R. Brown, 1813 CORAL-ROOT The generic name, _Corallorhiza_, refers to the coral-like masses of the roots of this genus. Scapose orchids, saprophytes or root-parasites, with large masses of coralloid branching roots. =Anther= 1. =Labellum= 1-3 ridged. =Sepals= and =petals= equal; 1-3 nerved, lateral sepals united at the base with the foot of the column, forming a short spur. =Flowers= several in a terminal raceme, purplish, yellowish and white. =Anther= terminal, operculate. =Pollinia= 4, in 2-pairs, free, soft and waxy. =Stem= or =scape= 4-20 inches high. =Leaves= all reduced to scales. =Seed-capsule= oblong, drooping when ripe.