Cardamine microthrix I. Thompson, Muelleria 9: 165. 1996. TYPE: Australia, Victoria, Clarke Lagoon Wildlife Reserve, NE study area, 28 Oct 1987, A. C. Beauglehole 89710 (holotype, MEL).

            Herbs, annual, glabrous or sparsely pubescent. Stems to 30 cm, often erect, glabrous or sparsely pubescent, branched at base and above. Basal leaves rosulate, long petiolate, to 8 cm, 3-5-foliolate, leaflets entire, crenate or shallowly lobed; terminaly leaflest broadly ovate, cordate at bse; lateral leaflets ovate, smaller than terminal, petiolulate; cauline leaves 2 or more, 3-5(-7)-foliolate, petiolate, not auriculate at base, leaflets minulately ciliate; terminal leaflet broadly ovate, often deeply and acutely (3-)5-9-lobed; lateral leaflets ovate, petiolulate, usually 3-lobed. Racemes ebracteate, few to many flowered; fruiting pedicels suberect, 5-10 mm. Sepals ovate, ca. 1.5 mm; petals white, cuneate, ca. 3 mm; stamens 6. Frutis linear, erect to suberect, 2-3 cm × ca. 1 mm; style 0.5-1 mm. Seeds elliptic, ca. 1.2 mm.

Flowering: Sep-Mar.

Habitat: along banks of rivera, streams, and lagoons and adjacent low-lying areas.

Elevation:

Distribution: Australia (New South Wales, South Australia, Victoria).