=Flowers=, one, terminal, mottled dull purple and white. =Labellum= conical, ½-⅔ inch, prolonged at the apex into a reflexed spur. =Sepals= all free. =Petals= narrow, similar in color, and assuming the place of horns to the ram’s-head-shaped flower. =Stem= leafy, 6-12 inches high. =Leaves=, 3-4, dark apple-green; 2-4 inches wide, smooth, without hairs. =Seed-capsule= prominently ridged. _Continental Range_—From Quebec, Ontario southward to North Haven, Connecticut, and Mt. Toby, Massachusetts; westward to Minnesota, the Great Lake region being the centre of distribution. Limited between the 40th-50th parallels. _New England Range_—Maine, rather abundant; New Hampshire, rare; Vermont, abundant; Massachusetts, rare; Connecticut, very rare. 2.—CYPRIPEDIUM REGINÆ Walter, 1788 (_Cypripedium spectabile_ Salisbury, 1791) WHITE-PETALED, OR SHOWY LADY’S SLIPPER—QUEEN OF THE MOCCASIN-FLOWERS The specific name, _reginæ_, refers to the queenly appearance of the white-petaled flowers. Large bogland orchid, with fleshy-fibrous roots. Frequent. June 15th-July 4th. =Flowers=, 1-4 terminal, large, showy, white, tinged with deep pink or wine; the most beautiful species among our native _Cypripediums_. =Labellum= shoe-shaped, inflated, drooping margins of the orifice inflected, crest deeply tinged with pink-purple; interior downy, ornamented with lines of deeper purple. Rarely pure white flowers occur. =Sepals= and =petals= similar, pure white; 2 lower sepals wholly united; side petals narrower than sepals. =Stem=, 1-3 feet high. =Leaves=, 5-7, alternating to top of stem; 3-7 inches long, clasping, 1-4 inches wide; 10-13 plaits; strongly pubescent, produces poisonous effect to susceptible people similar to that caused by _Rhus_. _Continental Range_—From Nova Scotia southward to the higher mountains of North Carolina, and Huntsville, Alabama; westward to Minnesota, Walhalla Mountains, North Dakota, and the Barrens of Kentucky. _New England Range_—Maine, frequent; New Hampshire, frequent; Vermont, common; Massachusetts, common; Rhode Island, no stations reported; Connecticut, frequent. [Illustration: =The Showy Moccasin-Flower.= (_Cypripedium reginæ._) This is the most gorgeous _Cypripedium_ in the world, and without doubt one of the most ancient types of the genus. The stigma is distinctly three-lobed. The plate shows the waxy texture of the white sepals and petals and the wine-colored crest of the shoe-shaped labellum, as well as the highly decorated interior.] 3.—CYPRIPEDIUM CANDIDUM Willdenow, 1805[66] SMALL WHITE LADY’S SLIPPER—THE PRAIRIE MOCCASIN-FLOWER The specific name, _candidum_, refers to the white labellum of this species. Small, damp swamp-land orchid, with fleshy-fibrous roots. Rare. May 11th-June 29th.