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Rust Fungi
Page Last Updated: October 26 2015
4 species
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Crown Oat Rust - approx. 1.5 cm
Order: Uredinales
Family: Pucciniaceae
Genus: Puccinia
Species: Coronata
Kingdom: Fungi
Class: Urediniomycetes
Phylum:  Basidiomycota (Basidiomycetes)
Also known as Crown Rust - heteroecious (barley / rye
and buckthorn hosts) - occurs on cultivated or wild oats
Quince Rust (Serviceberry fruit approx. 1 cm)
Order: Uredinales
Family: Pucciniaceae
Genus: Gymnosporangium
Species: Clavipes
Kingdom: Fungi
Class: Urediniomycetes
Phylum:  Basidiomycota (Basidiomycetes)
Also known as Cedar-quince Rust - heteroecious (rose
and cypress (juniper) hosts) - occurs on a wide range of
trees in the
Rose family
Cedar-Hawthorn Rust (spots to 1 cm)
Order: Uredinales
Family: Pucciniaceae
Genus: Gymnosporangium
Species: Globosum
Kingdom: Fungi
Class: Urediniomycetes
Phylum:  Basidiomycota (Basidiomycetes)
Also known as Hawthorn Rust - heteroecious (rose and
cypress (juniper) hosts)
Cedar-Hawthorn Rust leaf underside
Order: Uredinales
Family: Pucciniaceae
Genus: Gymnosporangium
Species: Globosum
Kingdom: Fungi
Class: Urediniomycetes
Phylum:  Basidiomycota (Basidiomycetes)
Also known as Hawthorn Rust - heteroecious (rose and
cypress (juniper) hosts)
Cedar-Apple Rust - approx. 2 cm
Order: Uredinales
Family: Pucciniaceae
Genus: Gymnosporangium
Species: Juniperi-virginianae
Kingdom: Fungi
Class: Urediniomycetes
Phylum:  Basidiomycota (Basidiomycetes)
Heteroecious (rose and cypress (juniper) hosts)
More Cedar-Apple Rust
More Cedar-Apple Rust
Updated April 7 2014
More Crown Oat Rust
More Crown Oat Rust
Updated November 7 2014
Quince Rust on Serviceberry - Serviceberry fruit approx. 1 cm - Scarborough (Agincourt) - July 2011
Cedar-Hawthorn Rust on Hawthorn leaf - spots to 1 cm - Lower Don Valley (Crother's Woods) - July 2011
Cedar-Hawthorn Rust on underside of Hawthorn leaf - tendrils to 2.5 cm - Lower Don Valley (Crother's Woods) - September 2011
Crown Oat Rust on European Buckthorn tree - approx. 1.5 cm - Beaver Creek (Richmond Hill) - June 2009
Cedar-Apple Rust on Red Cedar - approx. 2 cm - Rouge Park - June 2013
More Quince Rust
More Quince Rust
Updated October 26 2015