Stems to 50 cm long, rarely longer; branches divaricate. Leaves of branches: lamina ascending to ±spreading, 10-70 mm long, acuminate, slightly bluish green; margins finely scabrous; nerves 6-8, rounded; grooves narrow, finely scabrid; auricles narrowly triangular, acute or obtuse, 3-5 mm long, becoming lacerated; lamina of primary-stem leaves usually 30-80 mm long. Flowers in raceme-like inflorescences in upper axils, with 1-3 whorls up to 1 cm apart; peduncle 2-5 mm long; pedicels 2-3 mm long. Sepals and petals 5-7 mm long, white with purple midrib. Stamens c. 3 mm long. Pistil 3 mm long, slender. Capsule 6 mm long, verrucose; tubercles narrow, obtuse, 0.1-0.4 mm long. Seed 4 mm long, ±reticulate.
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