Stems erect, up to ± 5 dm. tall, herbaceous except towards base, close-set, quadrangular, arising from slender to stout branching rhizomes. Branches ascending, very slender; branchlets filiform, ∞, ascending, glab. Lvs opp. or subopp., on slender petioles hardly 1 mm. long. Lamina narrow-linear to filiform, membr., 7-10 × 1-2 mm. Lvs at base of branchlets sts broad-ovate, with 2 to 4 distinct lateral nerves. Racemes 3-5-(7) cm. long, with us. a few lvs towards base. Fls distant, on filiform pedicels up to 4 mm. long; sepals ovate-oblong, acute, up to c. 2 mm. long; petals similar, a little shorter. Carpels 10.
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