Rorippa nasturtium-aquaticum
Content
Description
Perennial, practically glabrous herb.
Leaves petiolate, auriculate, pinnatisect, oblong in outline, up to 10 cm long;
Sepals green, elliptic, c. 2 mm long.
Petals white, often with a violet tinge, obovate, c. 4 mm long.
Ovary narrowly ellipsoid, with short but distinct style.
Seeds shining, dark red-brown, nearly orbicular in outline, 1-1.3 mm long, covered by a distinct rather high reticulum, which forms 25-50 areoles at each side of the seed.
Distribution
Asia-Tropical: Borneo present (Sabah present); Jawa (Jawa present); Lesser Sunda Is. present; Philippines (Philippines present), Ethiopia present, Europe, Flores present, Luzon present, Papua New Guinea present, West Asia
Native in Europe and West Asia, perhaps also in Ethiopia; widely cultivated ('watercress') and spread with European settlements to temperate and montane areas throughout the world; in Malesia: Java (especially West, rarer in Central and East), Lesser Sunda Islands (Flores), Borneo (Sabah), Philippines (Luzon), Papua New Guinea. Probably naturalized in many more areas than so far recorded.
Citation
OCHSE & BAKH. 1931: Ind. Groenten: 176: f. 108
LENCH & OSBORNE 1985: Freshwater Pl. Papua New Guinea: 105
Koord. 1912 – In: Exk. Fl. Java: 288
BACKER 1911: Schoolfl. Java: 55
BACKER & BAKH.f. 1963 – In: Fl. Java: 191
Merr. 1923 – In: En. Philip.: 208
QUIS. 1951: Medic. Pl Philip.: 335
Miq. 1858 – In: Fl. Ind. Bat.: 73
GILLI 1980 – In: Ann. Naturhist. Mus. Wien: 430
Koord. 1898 – In: Meded. Lands Plantentuin: 342
BOERL. 1890 – In: Handl. Fl. Ned. Ind.: 58
BURK. 1935: Dict.: 1534
HEYNE 1927: Nutt. Pl Ned. Ind.: 680