Nick Upton / Common centaury (Centaurium erythraea) flowering in a chalk grassland meadow, Wiltshire, UK, August.

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

Adrian Davies / Burnet rose (Rosa pimpinellifolia) hip infected with Rust fungus (Phragmidium tuberculatum) The Burren, County Clare, Republic of Ireland

Adrian Davies / Rose stem (Rosa sp) infected with Rose rust fungus (Phragmidium tuberculatum)

Nigel Cattlin / Leek rust (Puccinia allii / porri), fungal disease infection and orange pustules on leaves of leek, May Berkshire, England, UK. May.

Nigel Cattlin / Leek rust (Puccinia allii / porri), fungal disease infection and orange pustules on leaves of leek, May Berkshire, England, UK. May.

Nigel Cattlin / Leek rust (Puccinia allii / porri), fungal disease infection and orange pustules on leaves of leek, May Berkshire, England, UK. May.

Nigel Cattlin / Arum / Ramson's rust (Puccinia sessilis) pustules and lesions on leaves of wild arum, lords and ladies (Arum maculatum) Berkshire, England, UK.

Nigel Cattlin / Arum / Ramson's rust (Puccinia sessilis) pustules and lesions on leaves of wild arum, lords and ladies (Arum maculatum) Berkshire, England, UK.

Nigel Cattlin / Plum rust (Tranzschelia pruni-spinosae var. discolor) pustules on the underside of a Victoria plum leaf Berkshire, England, UK.

Nigel Cattlin / Plum rust (Tranzschelia pruni-spinosae var. discolor) necrotic mottling spots of a Victoria plum leaf upper surface Berkshire, England, UK.

Nigel Cattlin / Crown rust (Puccinia coronata) leaf infection on meadow-grass (Poa sp.)

Adrian Davies / Rust fungus (Puccinia lagenophorae) growing on Groundsel (Senecio vulgaris) on black background, Surrey, UK. August.