This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", 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..
Scape 8'-2o' high, purplish, clothed with several appressed scales. Raceme 2'-8' long, 10-30-flowered; flowers mainly brownish purple, short-pedicelled; sepals and petals somewhat connivent at the base, linear-lanceolate, about 3" long; lip white, spotted and lined with crimson, oval or ovate in outline, deeply 3-lobed, crenulate, bearing two narrow lamellae, the middle lobe broader than the lateral ones, its apex curved; spur manifest, yellowish; capsule ovoid or oblong, 5"-8" long, drooping.
C. Wisteriana Conrad, Journ. Acad. Phila. 6: 145. 1829.
Stem slender, but sometimes stouter than that of the preceding species, 8'-16' high, bearing several sheathing scales. Raceme 2'-5' long, loose, 6-16-flowered; flowers slender-pedicelled, ascending or erect; sepals and petals 2 1/2"-3 1/2" long; lip broadly oval or obovate, 3"-4" long, abruptly clawed, white with crimson spots, crenulate, notched at the apex; lamellae, 2 short prominent ridges; spur, a somewhat conspicuous protuberance adnate to the top of the ovary; column strongly 2-winged toward the base; capsule elliptic-oblong or oblong-obovoid, about 5" long, drooping when ripe.
In woods, New England; Pennsylvania to Ohio, Florida and Texas. Feb.-May.
Cymbidium odontorrhizon Willd. Sp. PI. 4: 110. 1805. Corallorrhiza odontorrhiza Nutt. Gen. 2: 197. 1818.
Scape slender, purplish, 6' - 15' high. Raceme 2'-4' long, 6-20-flowered; flowers mainly purplish; sepals and petals lanceolate, 2" long or less, marked with purple lines; lip about as long as the petals, broadly oval or obovate, entire or denticulate, narrowed at the base, not notched, whitish, spotted with purple; spur, a small sac adnate to the top of the ovary; wings of the column very narrow.
In woods, Maine to Ontario, Michigan, Florida and Missouri. Ascends to 3000 ft. in North Carolina. Turkey-claw. Dragon's-claw. Crawley-root. July-Sept.
Scape stout, yellow, 7-16' high. Raceme 3'-5' long, 10-15-flowered; flowers yellow; sepals and petals oblong to oblong-lanceolate, 5"-6" long, not striped; lip yellow, shorter than the petals, ovate, entire, rounded at the base, obtuse; spur small, adnate to the ovary; wings of the column narrow.
In canons, western Nebraska and Colorado. June-July.
C. striata Lindl. Gen. & Sp. Orch. 534. 1840.
Corallorrhiza Macraei A. Gray, Man. Ed. 2, 453. 1856.
Scape stout, purplish, 8'-2o' high. Raceme 2'-6' long, 10-25-flowered. Flowers dark purple; sepals and petals narrowly elliptic, striped with deeper purple lines, 6"-7" long, spreading; lip oval or obovate, striate-veined, entire or a little undulate, somewhat narrowed at the base, about .as long as the petals, bearing two short lamellae; spur none, but the perianth has a gibbous saccate base; capsule ellipsoid, reflexed, 8"-10" long.
In woods, Ontario and northern New York to Michigan, Oregon and California. July.