Herbs annual or perhaps biennial, densely pubescent throughout. Stems erect, often single from base, branched above, (3-)4-9(-11) dm tall, pubescent with 3-7-rayed trichomes 0.1-0.4 mm, these sometimes mixed proximally with soft simple or 2-rayed trichomes to 1.2 mm. Basal leaves not rosulate, soon withered; middle cauline leaves sessile, auriculate to amplexicaul, oblong to lanceolate, 2-8(-12) ´ 0.5-2(-3.5) cm, pubescent with 4-8-rayed trichomes 0.1-0.4 mm, these sometimes mixed with soft simple or 2-rayed ones to 1 mm. Racemes elongated considerably in fruit; fruiting pedicels horizontal to divaricate ascending, densely pubescent, (2-)5-12(-15) mm. Sepals oblong, green to purplish, densely pubescent, 1.5-2.5 ´ 0.5-1 mm; petals white, oblanceolate, 1-2.5(-3.5) ´ 0.3-0.7( -1) mm, rarely obsolete or absent; filaments 1.5-2.5 mm; anthers oblong, 0.4-0.8 mm; ovules (100-)150-250 per ovary. Fruits narrowly oblong to linear, 0.8-1.5(-2) cm ´ 1.5-2 mm; valves densely pubescent with subsessile trichomes; style 0.2-0.6(-0.8) mm. Seeds oblong, biseriate or appearing multiseriate, 0.4-0.55(-6.5) ´ 0.25-0.35(-0.4) mm.
Flowering: Sep-Feb.
Habitat: moist banks near stream.
Elevation: 300-3500 m.