Broad-leaved Willowherb

Broad-leaved Willowherb - Epilobium montanum

Description

Short to medium plant with a rounded stem. Leaves all opposite, the upper alternate, oval, usually toothed, and very short stalked. Flowers purplish pink, 6 to 12 mm, in lax racemes, the petals notched. Stigma four lobed.

Similar Species

A species on the VC55 Rare Plant Register, E lanceolatum, also has 4-lobed stigma and is similar, but with narrow leaves gradually narrowing to the petiole.  Epilobium commonly hybridise, and specimens that do not meet all the characteristic of E montanum may be hybrids.

Identification difficulty
Recording advice

Photos showing 4-lobed stigma and leaf-shape are needed

Habitat

Waste places, pathways and cultivated ground.

When to see it

May to August.

Life History

Perennial.

UK Status

Common and widespread throughout Britain.

VC55 Status

Common in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 431 of the 617 tetrads.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020

UK Map

Additional images

All NatureSpot records

Photo of the association

Aphis epilobii

The aphid Aphis epilobii feeds on Broad-leaved Willowherb or more rarely other Willowherb species. Adult apterae of Aphis epilobii are dark blackish-green to reddish-brown, but often appear dark-grey to pinkish-brown because of a rather uniform powdering of wax.  The alate has marginal postsiphuncular and small marginal sclerites, but no dorsal cross bands in front of the siphunculi.

Photo of the association

Willowherb Rust

The rust causes galls on the leaves of Willowherbs (Epilobium species) and the whole plant appears paler than usual, with curled leaves.  There is no host alternation.  Raised yellowish blotches bear orange aecia, usually on underside of leaf; brown uredinia and telia are present later.