Russia Flora: Plant: Up to 150 cm tall, with thick rhizome. Leaves: In basal rosette, sheath-like expanded at base, gradually narrowing upward and acuminate, linear, triangular in cross-section, 40-120 cm long and (3)5-8(10) mm wide. Inflorescence: Umbel-like, with involucre of bracts at base, borne on leafless scapes. Flowers: 10-30(50), on long pedicels. Perianth of 6 light pink or pinkish-white segments, outer segments only slightly shorter than inner ones, inner segments 5-12 mm long. Stamens 9. Gynoecium of 6 carpels fused only at base. Fruit: Aggregate of follicles. Seeds: Short-cylindrical. Chromosome number: 2n=16 (Probatova, Sokolovskaya, 1984a). (Table XXX). Flowering in July-August.

Distribution: Dauria, Lower Zeya (southeast), Ussuri (southwest). (Fig. 99). Found along water bodies, in marshes and marshy meadows; rare and possibly only as an introduced species.

General distribution: European part, Caucasus, Western and Eastern Siberia, Central Asia; Scandinavia (south), Atlantic and Central Europe, Mediterranean, Asia Minor, Iran, Himalayas, Japanese-Chinese region, North America (introduced but naturalized). Described from Europe.