Japan Flora: Glabrous perennial herb; leaves narrowly oblong, 30-50 cm. long, 6-12 cm. wide, glabrous, the ligules 5-6 mm. long, loosely ciliolate, the petioles short; inflorescence 10-20 cm. long, erect, the branches 0.8-1.3 cm. long, slender, 3- to 4-flowered at the summit, the bracts pale, membranous, 7-10 mm. long, obtuse; calyx-tube 35-4.5 mm. long, with small teeth, sometimes loosely ciliolate, the lip ovate, narrowed below. July. Woods;

Honshu (Izu Isis, and Kii Prov.), Shikoku, Kyushu. Ryukyus and Formosa.