Pal Hermansen / Dropwort (Filipendula vulgaris) growing in the boot of an old abandoned car in 'car graveyard', Bastnas, Sweden, July. Winner of the Portfolio category in the Melvita Nature Images Awards competition...

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) umbel, Chesil Beach, Dorset, England, UK. May.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flowers against blue sky. Chesil Beach, Dorset, England, UK. May.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flower heads. Growing beside canal, Berkshire, England, UK. June.

Nigel Cattlin / Hemlock water dropwort (Oenanthe crocata) flower head. Growing beside canal, Berkshire, England, UK. June.

Nick Upton / Hemlock water-dropwort (Oenanthe crocata) umbel flowering, Wiltshire, UK, May.

Nick Upton / Hemlock water-dropwort (Oenanthe crocata) flowering on a river bank, Wiltshire, UK, May.

Nick Upton / Hemlock water-dropwort (Oenanthe crocata) flowering on a river bank, Wiltshire, UK, May.

Stephen Dalton / Water dropwort flower (Oenanthe crocata), the most poisonous plant in UK. Sussex, England

Nick Upton / Hemlock water dropwort stem (Oenanthe crocata) cut by a Water vole (Arvicola amphibius) at a tell-tale 45 degree angle, found during a survey for signs of Water vole activity. This plant is highly to...

David Kjaer / Dropwort (Filipendula vulgaris) and rough hawkbit (Leontodon hispidus), Martin Down National Nature Reserve, Hampshire, UK, June.

Nick Upton / Dani Siddall of Derek Gow Consultancy looking at stem of Hemlock water dropwort (Oenanthe crocata) cut by Water vole (Arvicola amphibius), and left on river bank. Found during survey for signs of Wate...