greenmags's picture

Nettle with strange growth

Observed: 17th June 2013 By: greenmagsgreenmags’s reputation in Plantsgreenmags’s reputation in Plantsgreenmags’s reputation in Plantsgreenmags’s reputation in Plants
P1040325
iP1040326
iP1040328
Description:

Yellow growth ~ 2.5 cm long, causing nettle to bend but seems otherwise healthy. Growth feels solid, pitted..anyone know what causes it?

Identifications
Species interactions

No interactions present.

Species with which Common Nettle (Urtica dioica) interacts

Comments

steve_t's picture

Rust Fungi

The growth is caused by a rust fungi called Puccinia urticata. You should add it as a species interaction.
Steve.

Plymouth Phil's picture

Nettle gall

Cecidologists (people who study plant galls) regard this growth caused by Puccinia urticata as a plant gall.