Russia Flora: Plant: Up to 70 cm tall, with tuber-like thickened base, from which arise leaves arranged in rosette and a leafless scape bearing inflorescence. Leaves: Leaf blade lanceolate, cuneately narrowed at base. Inflorescence: Panicle-like, with bracts at base of branches. Flowers: Petals 3-6 mm long and 2.7-5.8 mm wide, white. Anthers 1.7-3 mm long. Styles in flowers and fruits 0.4-0.9 mm long. Fruit: Fruitlets 1.6-3 mm long, with style base protruding as a tubercle; thickened marginal part of their lateral sides gradually transitions into opaque coriaceous-membranous part. Chromosome number: 2n=28 (Probatova, Sokolovskaya, 1986). Flowering in August-September.

Distribution: Southern Kurils (Kunashir Island, near Yuzhno-Kurilsk). (Fig. 100). Found in marshes and marshy meadows.

General distribution: Japanese-Chinese. Described from Japan.