Rhizome subterete, 5--8 mm thick. Leaves solitary, spaced; petiole 45--55 cm, stiff; leaf blade oblong-lanceolate, 40--45 × ca. 5.5 cm, margin denticulate. Scape 1--4 cm; bracts 4 or 5, white, speckled with purple. Flower solitary. Perianth campanulate, 6-lobed apically; tube pale yellow, 7--8 mm × 1--1.2 cm; lobes slightly recurved, purple, subdeltoid, 8--10 × 6--7 mm. Stamens 6, inserted proximally in perianth tube; filaments ca. 1 mm; anthers ovate, 3.5--4 mm. Pistil ca. 7 mm; stigma large, ca. 5 mm in diam., obviously exceeding anthers, undulate at margin. Fl. Oct.
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