Eastern prairie white fringed orchid is an erect forb with showy racemes, spike cylindric 8-20cm long and 5-7cm wide. Its petals are cuneate to broadly obovate, toothed. Lateral sepals are divergent. Its lip and lateral petals are white or creamy, sepals are green or greenish-white, broadly oval to obovate, 7-13mm. Lateral petals are toothed, wedge-shaped, and slightly longer than the sepals. Lip is deeply 3-lobed, the terminal lobe short-clawed and usually deep-notched in the center, the lateral lobes fringed to the middle or below; spur slender and elongate. Its lower leaves are lanceolate to oval, to 15cm long and 4cm wide, acute or blunt; upper leaves much reduced, long, narrow and sharp-pointed.