Rorippa dubia (Pers.) Hara

Herbs annual, (4-)15-33(-45) cm tall, glabrous or rarely sparsely pubescent. Stems often branched basally and apically. Basal leaves withered by flowering. Lower and middle cauline leaves auriculate or not; petiole to 4 cm, rarely absent; leaf blade lyrate-pinnatipartite or undivided, obovate, oblong, or lanceolate, (2-)3-11(-15) × (0.5-)1-3(-5) cm, margin entire or irregularly crenate or serrate, apex obtuse or subacute; terminal lobe oblong, elliptic, or oblong-lanceolate, to 14 × 4 cm; lateral lobes absent or 1-4 on each side of midvein. Uppermost leaves usually sessile, auriculate or not; leaf blade lanceolate or oblong, margin entire or serrulate, apex acute or acuminate. Racemes ebracteate. Fruiting pedicels slender, divaricate, straight, (2-)3-8(-10) mm. Sepals often pinkish, ascending, oblong-linear, (2-)2.5-3 × 0.5-0.7 mm, margin membranous. Petals mostly absent, rarely present and linear or narrowly oblanceolate, 1.5-2.5 × 0.2-0.7(-1) mm, often shorter than sepals. Filaments 1.5-2.8 mm; anthers oblong, 0.5-0.8 mm. Ovules 70-90 per ovary. Fruit linear, (1.5-)2.5-4 cm × 0.7-0.9(-1) mm, straight; valves thin papery, not veined; style 0.2-1(-1.5) mm, stout and about as wide as fruit, rarely slender and narrower. Seeds reddish brown, subquadrate or ovate-orbicular, 0.5-0.8 × 0.4-0.6 mm, foveolate, uniseriate. Fl. and fr. throughout the year. 2n = 32*, 48*.

A tropical plant. It grows in wet places. It grows from near sea level to 3,700 m above sea level. In Argentina it grows below 500 m above sea level. It grows in wetlands. In Yunnan. In Sichuan.

It is used as a vegetable in curries. It is also used in salads and soups.