Rhizome 1--1.5 cm thick. Stem 70--80 cm. Leaves 7--9; petiole ca. 3.5 cm; leaf blade suboblong, 10--12 × 4--4.5 cm, base subrounded or broadly cunneate. Peduncle 20--30 cm. Outer tepals 4 or 5, green, lanceolate or oblanceolate, 5--6 × ca. 2 cm; inner ones pendulous, yellow-green, linear, 5--6 cm × 2--3 mm, margin undulate. Stamens 8 or 10; filaments 5--6 mm; anthers 1.1--1.2 cm; free portion of connective cylindric, 1.1--1.5 cm, apex acute. Ovary green, ovoid-globose, 1-loculed, apex truncate. Stigma lobes 4 or 5, purple, 6--7 mm. Fl. Apr--May.
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