Cardamine geraniifolia (Poiret) de Candolle, Syst. nat. 2: 268. 1821; Sisymbrium geraniifolium Poiret in Lamarck, Encycl. 7: 218. 1806; Dentaria geraniifolia (Poiret) Reiche, Fl. Chile 1: 104. 1896. TYPE: Chile, Magellan, Commerson s.n. (holotype, P-JU !; isotypes, 2P!)

Herbs, perennial. Rhizomes fleshy, elongated, non-scaly, to 12 cm ´ 6 mm. Stems (14-)20-38(-46) cm, erect or decumbent only at base, simple or branched above, often glabrous. Rhizomal leaves and lowermost cauline compound, pinnate, (7-)12-28 cm; petiole (3-)6-10(-15) cm; lateral leaflets 2-4 pairs, broadly to narrowly ovate, 2-6 ´ 1.5-5 cm, sparsely to moderately pubescent with trichomes to 0.5 mm, pinnately lobed or incised to coarsely dentate or serrate, base oblique or rarely cuneate, apex acute; petiolule (0.8-)1-2.2 cm; terminal leaflet same size or slightly larger than lateral ones; cauline leaves 3-5, progressively smaller and with shorter petioles and petiolules upward. Racemes ebracteate, 8-15-flowered, dense corymbose, ebracteate, slightly to strongly elongated in fruit; rachis straight; fruiting pedicels 0.9-2.5 cm, stout, ascending to divaricate-ascending, straight. Sepals green, oblong, 4-6 ´ 2-2.5 mm, caducous, glabrous; petals white, broadly obovate, (0.8-)1-1.5 cm ´ 4-8 mm, apex obtuse or rounded; filaments 4-7 mm; anthers oblong, 1-1.5 mm; ovules 12-2o per ovary. Fruits linear, (3-)4-8(-9) cm ´ 2-2.5(-2.9) mm, glabrous; style (2-)3-5 mm. Seeds brown, oblong, 2.5-3.2 ´ 1-1.8 mm. 2n = 144.

Flowering: Oct-Feb.

Habitat: wet or swampy areas.

Elevation: 0-600 m.

Distribution: Argentina (Santa Cruz, Tierra del Fuego), Chile (Región X, XI, XII).