Rorippa
Content
Description
Annual to perennial, small to rather tall herbs with a taproot, sometimes also with root-runners or adventive roots from the stem-nodes, practically glabrous to pubescent with simple, pointed hairs.
Leaves membranous, usually pinnatifid to pinnate, often auriculate.
Sepals greenish, elliptic, not saccate, spreading.
Petals yellow or white, equalling or up to ± twice as long as the sepals.
Stamens 6, distinctly tetradynamous, with usually linear filaments;
Ovary spheroid to narrowly cylindrical, with numerous ovules.
Fruits terete, very variable in shape (globose to narrowly linear), without or rarely with a very short gynophore, usually with a short but distinct style and flat to slightly bifid stigma, dehiscent by 2 valves with or without very fine midnerve.
Seeds many to numerous, not mucilaginous, finely and variously sculptured, yellowish to dark brown, ellipsoid to spheroid, wingless, 0.5-1.5 mm diameter.