Stem subterranean, 3–10 mm, with a few minute scales; fl solitary, white and partly bluish-green, partly subterranean, obovoid-oblong, 8–15 mm, inner perianth-segments curved-ascending and connate at the tip. Known only from a wet prairie near Chicago, Ill., and not seen since 1916, the site now destroyed. Late summer. Very similar to T. rodwayi F. Muell., of Tasmania and N.Z.