Common name:
Great yellow cress
Family:
Scientific name:
Rorippa amphibia
Main flower color:
Range:
Streambanks, ditches, freshwater margins; generally damp places
Height:
Up to 120 cm
Habitat:
Mostly in south and central England, and Ireland
Flowers:
In simple, elongated clusters; for greenish-yellow sepals, and four pale yellow petals of twice the length
Fruit:
Short, green, elliptical pods, up to 15 mm long, topped by residual style
Leaves:
Hairless, lanceolate, shallowly toothed, occasionally pinnately lobed. On rigid, hollow, grooved stems
Season:
June to October
Rarity:
★★★★★
