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Pakistan | Family List | Brassicaceae

Rorippa Scop., Fl. Garn. 520. 1760. Vas. in Kom., l.c. 135; Clapham et al, l.c. 1952; Coode & Cullen in Davis, l.c. 431; Hedge in Rech. f., l.c. 215.

Rorippa sylvestris

Credit: Shaukat & Azmat

Differs from Nasturtium R.Br. primarily by its small yellow flowers with short or reduced petals, erect habit and usually with a ± slender tap root.

Annual to perennial herbs of damp places, usually with a slender tap root or rootstock. Leaves pinnate to almost entire. Petals often about as long as the sepals, rarely absent. Stamens 6, rarely 4 (the outer pair abortive). Ovary oblong to suborbicular, many ovuled. Siliquae linear-cylindrical, ellipsoid or almost spherical, bilocular, dehiscent; valves convex, membranous, usually glabrous; septum membranous; seeds mostly biseriate, suborbicular, reddish-brown, with finely reticulated surface; radicle accumbent.

About 90 species, throughout the North Temperate zone; only 4 recorded from our area.

1 Petals not exceeding the sepals or absent; flowers 2-2.5 mm across   (2)
+ Petals distinctly exceeding the sepals; flowers c. 4 mm across   Rorippa sylvestris
2 (1) Siliquae 5-10 mm long, 2-2.5 mm broad; seeds conspicuously biseriate; lower and middle leaves pinnatifid, 3-5 jugate   Rorippa islandica
+ Siliquae (10-) 15-20 (-25) mm long, 1-1.5 mm broad; seeds uni- or sub-biseraite; leaves almost simple, not or hardly lobed   (3)
3 (2) Plants less robust; leaves less divided, slightly toothed or almost entire; ovules 50-90; seed c. 0.7 mm long; siliquae 1 mm broad; (perennial)   Rorippa montana
+ Plants tall robust; leaves somewhat more divided and toothed; ovules 100-150; seed c.0.5 mm long; siliquae 1.5 mm broad; (annual or biennial)   Rorippa indica

Lower Taxa

Related Synonym(s):


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