Herbs dioecious. Roots usually with swollen, tuberous part 1.5--3.5 cm × 5--8 mm. Stems erect, 45--100 cm, unarmed, smooth or slightly striate, sometimes narrowly winged distally; branches narrowly winged. Cladodes in fascicles of 3, linear, falcate, (2--)5--12 × 1--3 mm, flat, midvein distinct. Leaf spur short. Inflorescences developing after cladodes. Flowers of both sexes solitary or in clusters of 2--4; pedicel 1--1.5 mm or less. Male flowers: perianth white, campanulate, 3--4 mm; stamens unequal; filaments adnate to perianth segments for ca. 1/4 their length. Female flowers: perianth ca. 2 mm. Berry 5--6 mm in diam., 2-or 3-seeded. Fl. May--Jun, fr. Jul--Aug.
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