Sparganium erectum L.
Flowers or seedcapsules for cutting; water- or marshplants; 
VI-VII, Z5-8, 50 cm;
Bur-reed, round blossoms, decorative round prickly fruits until winter.

Jõgitakjas

Eng.: Branched Bur-reed, Simplestem Bur-reed. Suom.: Haarapalpakko. Sven.: Stor igelknopp, grenigelknopp, kantvass, storigelknopp, vanlig storigelknopp. Bot. syn.: Sparganium neglectum Beeby, Sparganium ramosum Huds. Sparganium polyedrum.