Puccinia hieracii

Description

The rust fungus Puccinia hieracii causes galls in several Asteraceae genus - e.g. Knapweeds (Centaurea),  Hawkweeds (Hieracium), Hawkbits (Leontodon/Scorzoneroides), Ox-tongues (Helminthotheca/Picris), Mouse-ear Hawkweed (Pilosella), Saw-wort (Serratula) and Dandelion (Taraxacum).   

Typically, the gall is a thickened deformed leaf with reddish-yellow spots bearing aecia, followed by uredinia and telia.

Probably a species complex.  The gall-causing rust on Dandelion (Taraxacum) is listed as Puccinia taraxaci in Redfern and Shirley (2023) but with the rider that it may be a variety of Puccinia hieracii sensu lato.

Similar Species

Puccinia calcitrapae on Knapweed.  Puccinia variabilis has small orange aecia but is not thought to be a gall-causer. 

Identification difficulty
UK Status

Widespread in Britain.

VC55 Status

Status in Leicestershire and Rutland not known.

Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Fungi
Kingdom:
Fungi
Order:
Pucciniales
Family:
Pucciniaceae
Records on NatureSpot:
25
First record:
27/05/2016 (Grimes, Martin)
Last record:
10/10/2023 (lemmon, roy)

Total records by month

% of records within its species group

10km squares with records

The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.

In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.

Latest images

Latest records