Phragmidium fragariae

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Description

Phragmidium fragariae is a rust on Barren Strawberry (Potentilla sterilis). There is no host-plant alternation. Aecia and uredinia are orange-yellow, mostly on leaf undersides and petioles but also on calyx. Telia are dark purplish-brown; teliospores with 4 cells, a pedicel, and no apiculus.

Identification difficulty

host

Recording advice

Photograph the rust on the plant, and you must note the host-plant

Habitat

Barren Strawberry, Potentilla sterilis

sue
Bagworth, Baptist Chapel yard
17 April 2020
on Potentilla sterilis, Barren Strawberry
sue
Shepshed Cemetery
23 November 2025
Barren Strawberry
telia
sue
Bagworth, Baptist Chapel yard
17 April 2020
sue
Shepshed Cemetery
23 November 2025
teliospores with 4 cells
sue
Shepshed Cemetery
23 November 2025
telia on underside
sue
Enderby, St John Baptist churchyard
20 March 2026
sue
Enderby, St John Baptist churchyard
20 March 2026
sue
Bagworth, Baptist Chapel yard
17 April 2020
sue
Shepshed Cemetery
23 November 2025
teliospores
sue
Enderby, St John Baptist churchyard
20 March 2026
sue
Swithland, St Leonard's churchyard
21 March 2026
rust on Barren Strawberry