Scapes 4 to 10 inches high, striate and smooth from a perennial solid bulb, the base of the stem sheathed by several scales and two ovate or oval, blunt, shining, light-green leaves, 2 to 5 inches long, 1 to 2½ inches wide. Flowers yellow, numerous, rather showy, forming a loose terminal raceme; petals very narrow and threadlike; lip erect, large, fully one-half inch long, wedge-obovate in shape. Capsule club-shaped and about one-half inch long.
In moist woods, thickets and recent clearings, Maine to Minnesota, south to Georgia and Missouri. Flowering from latter part of May to July.
Figure XIV Large Twayblade (Liparis liliifolia (Linnaeus) L. C. Richard)