Ash Rust on Green Ash in Harford Co., Maryland (6/16/2020). (c) apistopanchax, some rights reserved (CC BY-NC).

View Record Details Photo by Josh Emm MBP List

Ash Rust on Green Ash in Harford Co., Maryland (6/16/2020). (c) apistopanchax, some rights reserved (CC BY-NC).

View Record Details Photo by Josh Emm MBP List

Ash Rust (pustules on leaf petiole) in Howard Co., Maryland (5/25/2020). Verified by Jo Solem.

View Record Details Photo by Sue Muller MBP List

Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 355831 - Psn: 50)

Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (CC BY-NC).

View Record Details Photo by Joanne Solem MBP List

Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (CC BY-NC).

View Record Details Photo by Joanne Solem MBP List

Ash Rust (dorsal surface of leaf) in Howard Co., Maryland (5/31/2020).

View Record Details Photo by Joanne Solem MBP List

Ash Rust (pustules on ventral surface of leaf) in Howard Co., Maryland (5/31/2020).

View Record Details Photo by Joanne Solem MBP List

Spores of Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 355832 - Psn: 105)

Spores of Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (CC BY-NC).

View Record Details Photo by Joanne Solem MBP List

Spores collected from an Ash Rust specimen in Howard Co., Maryland (5/31/2020). Almost round, warty, hyaline/orangish; measured 29.3-28.6 x 29.9-30.3 microns.

View Record Details Photo by Robert Solem MBP List

Map Snapshot

15 Records

GA AL WA FR CL MO HO BA BC HA CE PG AA CV CH SM KE QA CN TA DO WI SO WO

Description

Yellow patches on leaves and twigs; yellow to orange pustules develop producing powdery spores.

Relationships

Found on leaves, petioles, and twigs of ash trees (Fraxinus). Alternative hosts are various species of cordgrass (Sporobolus) and Seashore Saltgrass (Distichis spicata). (J. Solem, pers. comm.)

Seasonality Snapshot

Resources

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Eating mushrooms can be dangerous. One should do so only with expert advice and great care. MBP accepts no liability for injury sustained in consuming fungi or other biodiversity. Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

Ash Rust on Green Ash in Harford Co., Maryland (6/16/2020). (c) apistopanchax, some rights reserved (CC BY-NC). View Record Details Media by Josh Emm.

Ash Rust (pustules on leaf petiole) in Howard Co., Maryland (5/25/2020). Verified by Jo Solem. View Record Details Media by Sue Muller.

Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (CC BY-NC). View Record Details Media by Joanne Solem.

Ash Rust (dorsal surface of leaf) in Howard Co., Maryland (5/31/2020). View Record Details Media by Joanne Solem.

Ash Rust (pustules on ventral surface of leaf) in Howard Co., Maryland (5/31/2020). View Record Details Media by Joanne Solem.

Spores of Ash Rust in Howard Co., Maryland (5/31/2020). (c) Joanne and Robert Solem, some rights reserved (CC BY-NC). View Record Details Media by Joanne Solem.

Spores collected from an Ash Rust specimen in Howard Co., Maryland (5/31/2020). Almost round, warty, hyaline/orangish; measured 29.3-28.6 x 29.9-30.3 microns. View Record Details Media by Robert Solem.