Java Water-dropwort - Oenanthe javanica

Description

With pinkish or variegated leaves (an ornamental escape from gardens or newly planted ponds).  The 'Flamingo' variety has leaves with colourful pink edges.  Grows to about 1 metre in height, with fibrous roots. The flowers have 5 white petals and 5 prominent stamens and are borne in umbels; at least some are leaf-opposed, as well as terminal. The leaves are aromatic, glabrous, and have a sheath covering the stem. The leaflets are divided into lobes and toothed. The stems are hollow.

Similar Species

Oenanthe aquatica and O fluviatilis - both on the Rare Plant Register.

Identification difficulty
ID guidance

Pinkish or variegated leaves.  

Recording advice

The County Recorder has asked for a specimen of this plant to be retained for verification

Habitat

An ornamental aquatic plant, recently escaped from cultivation, or deliberately planted around new ponds. Moist areas.

When to see it

Flowers July to September.

Life History

Perennial herb.

UK Status

Status in Britain remains unclear at present; it is mentioned in Stace (4th edition) but does not appear in keys or have a full description.

VC55 Status

Rare or under recorded in Leicestershire and Rutland. It was not recorded in the 1979 Flora survey of Leicestershire, and does not appear in the current checklist (Jeeves 2011).

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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