Nigel Cattlin / Antirrhinum rust (Puccinia antirrhini) with pustules on underside of Snapdragon (Antirrhinum sp) leaf. Cultivated in garden, Berkshire, England, UK. August.

Nigel Cattlin / Rose rust (Phragmidium mucronatum) pustules on underside of ornamental Rose (Rosa sp) leaf. Berkshire, England, UK. July.

Nigel Cattlin / Rose rust (Phragmidium mucronatum) lesions and chlorosis on ornamental Rose (Rosa sp) leaf. Berkshire, England, UK. July.

Will Watson / Nettle clustercup rust fungus (Puccinia urticata) induced gall on Common nettle (Urtica dioica), Westhope Common, Herefordshire, England, UK, May.

Alex Hyde / Violet bramble rust (Phragmidium violaceum) causing red colouration on Bramble leaf (Rubus fruticosus aggregate). Peak District National Park, Derbyshire, UK. October.

Alex Hyde / Violet bramble rust (Phragmidium violaceum) causing red colouration on Bramble leaf (Rubus fruticosus aggregate). Peak District National Park, Derbyshire, UK. October.

Chris Mattison / Butterbur rust (Coleosporium petasites) Derbyshire, England, UK, August.

Pal Hermansen / Fly agaric (Amanita muscaria) growing in car graveyard, Bastns, Sweden, September.

Adrian Davies / Willow (Salix) leaf, with Willow leaf rust (Melampsora) Surrey, England, June.

Adrian Davies / Willow (Salix) leaf, with Willow leaf rust (Melampsora) Surrey, England, 2014.

David Woodfall / Botanist using eye piece to identify Black Stem Rust, a fungus species which threatens future of world wheat crops. Radnorshire, Wales, UK, June.

Colin Monteath / Abandoned car covered in lichen and rust, Canterbury, New Zealand