Great Yellow-cress - Rorippa amphibia

Description

Medium to tall plant with runners. Lower leaves toothed, sometimes pinnately lobed and short stalked, upper leaves lanceolate, unstalked. Flowers bright yellow, 5 to 6 mm, petals twice as long as sepals.

Similar Species

other Rorippa and yellow crucifers in wet places

Identification difficulty
ID guidance

Upper leaves toothed but not lobed; seed-pods short, oval

Recording advice

General photo of plant in habitat, showing leaves and flowers/fruit

Habitat

Margins of rivers, canals and reservoirs and occasionally in marshes and pond margins.

When to see it

June to August.

Life History

Perennial.

UK Status

Widespread in southern Britain less frequent elsewhere.

VC55 Status

Fairly frequent in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 106 of the 617 tetrads.

In the current Checklist (Jeeves, 2011) it is listed as Native, locally frequent

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Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map