Japan Flora: Radical leaves several, narrowly obovate- oblong or oblong, long- or short-petioled, 3-8 cm. long, 1.5-3 cm. wide, obtuse to subacute, the margins slightly undulate; scapes 15-45 cm. long, the cauline leaves linear-lanceolate to linear, green, sessile，ascending to subappressed; inflorescence elongating after anthesis, 4-20 cm. long, rather densely many- flowered, the flowers white, the upper 3-4 tepals 7-12 nun. long, obtuse, spreading; capsules oblong, erect, 3-3.5 mm. long, the seeds lanceolate, 2 in each carpel, with a short tail at one end，about 3 mm. long. May-June. Honshu (Kanto Distr., Echigo Prov. and westw.), Shikoku, Kyushu；s. Korea.

var. hisauchiana Okuyama. Azuma-shiraito-so. A smaller phase with shorter tepals about 3-5 mm. long. Honshu (Kanto Distr.).