Tubular Water-dropwort - Oenanthe fistulosa

Description

Medium to tall, greyish, hairless, stoloniferous plant. Stems little branched, ridged, hollow and often constricted at the nodes. Basal leaves 1 to 2 pinnate with oval lobed leaflets. Upper leaves pinnate with narrower leaflets, untoothed, with sheathing long hollow stalks. Flowers white or pink 3 mm in small umbels with only 2 to 4 thickened rays. Generally without bracts.

Identification difficulty
ID guidance

All umbels terminal; fruits without stalks, forming a globular cluster when ripe; leaves with petioles longer than the divided part; stems hollow and very thin-walled.

Recording advice

A series of photos of the plant in its habitat, with details of flower heads and/or fruits, stems and leaves

Habitat

Shallow water and marshy habitats on fertile soils.

When to see it

Flowers June to September.

Life History

Perennial.

UK Status

Widespread and fairly frequent in Britain from Yorkshire southwards, though less frequent in the south west.

VC55 Status

Scarce and declining in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 45 of the 617 tetrads.

In the current Checklist (Jeeves, 2011) it is listed as Native; possibly scarce; it has declined sharply and now known from about 10 localities, almost all in the Soar valley.

It is on the Rare Plant Register

 

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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