Japan Flora: Flowers yellow. Said to occur in Honshu (Suruga and Izu Prov.) and in Amami-Oshima in the Ryukyus; frequently cultivated in our gardens.
var. tigrinum (Regel) Nichols. Bulbs subglobose, with slender hypogeal stolons; stems 1-2 m. long, terete, erect, usually papillose-tubercled; leaves linear, 8-15 cm. long, 5-12 mm. wide, glabrous or slighdy white-hairy; flowers few, nodding, orange-red, spotted, often white-woolly outside, the tepals gently revolute, lanceolate, 6-8 cm. long, hairy on margin of the nectary groove. July-Aug. Honshu, Shikoku, Kyushu. Korea and Manchuria.