Stems erect or spreading, arising from the far-creeping branched rhizomes, up to ± 4 dm. long; quadrangular, slender to rather stout; branchlets ± pubescent, slender. Lvs on petioles hardly 1 mm. long; lamina ovate to narrow-ovate or ovate-lanceolate, (10)-12-15-(20) × (3)-5-10-(13) mm., subcoriac., acute to subacuminate, rounded to truncate at base, with a pair of prominent lateral nerves; margins strongly, crisply, sinuate-undulate. Racemes axillary or terminal on branchlets, ascending to spreading, ± 5-7 cm. long; fls rather distant, on pedicels ± 4 mm. long. Sepals oblong-ovate, ± 1·5 mm. long; petals similar, slightly smaller. Carpels 5-(7).

2n = 70