- Almost glabrous, 7-25 cm, richly branched; branches long, spreading to ascending. Leaves almost sessile; blade narrowly lanceolate, entire, up to 5.5 cm, acute to obtuse, green to reddish; margin entire. Inflorescences terminal and axillary, di- or monochasial, with elongated intemodes and ultimate branches transformed into spines; flowers short-stalked. Tepals spreading in fruit. Seed horizontal, suborbicular in outline, 0.8 mm. - [2n=18]
F EH Tampere 1960-71 (with Russian railway transports). - From easternmost Europe to Siberia.
D VJy Esbjerg 1928 (port), Sjæ København several records 1921-32 (waste ground, factory area). S Bl Karlshamn 1940 (oil factory), BhG Göteborg (three localities 1929-33), Upl Rasbo 1997.