Distribution
Ukraine

Native to: Altay, Austria, Central European Rus, Czechoslovakia, East European Russia, Greece, Kazakhstan, Krasnoyarsk, North Caucasus, Transcaucasus, Turkey, West Siberia, Xinjiang.

Plants perennial. Rhizome creeping, 40-70(-120) cm. Stems terete, 2-3.5 mm in diam., hollow. Basal leaves few, cauline leaves 3 or 4(or 5); leaf sheath auricles well developed; leaf blade terete, 8-23 cm × 1-2.5(-3) mm, ribbed, perfectly septate, apex acute. Inflorescences terminal, 3-5-branched; involucral bract leaflike, 7-10 cm, apex acute; heads 35-70, globose, ca. 6 mm in diam., 6-16-flowered; bracts broadly lanceolate, 1.5-2.2 mm, 1-veined. Perianth segments chestnut brown, lanceolate; inner segments 2.5-3 × ca. 0.8 mm, slightly longer than outer ones, veins 1-3, apex acute. Stamens 6, 1.5-2 mm; anthers 0.7-1 mm, equaling or slightly longer than filaments. Stigmas ca. 2 mm. Capsule trigonous ovoid, 2.2-2.6 mm, 1-loculed, apex abruptly contracted to a short beak. Seeds ovoid, 0.3-0.5 mm, reticulate. Fl. Jul-Aug, fr. Aug-Sep.
Wet places by lakes; ca. 600 m.