Life cycle of white pine blister rust

White pine blister rust on pine

AeciaSpermatia

White pine blister ruston current leaves

TeliaUredinia

B

B

B

A

A A

AA

A

AA

A

On Pine hostOn angiosperm leaves

UU

U

U

U

Late summer& Fall

SummerSpring

multiple fertilizationskaryogamy& meiosis

1

2

3

4

5

Stalactiform rust on lodgepolepine. (Aecial stage) alternateswith Castilleja Indian paintbrush

B

B

B

A

A A

AA

A

AA

A

On Pine hostOn angiosperm leaves

UU

U

U

U

Late summer& Fall

SummerSpring

multiple fertilizationskaryogamy& meiosis

1

2

3

4

5

Western Gall RustPeridermium harknessii

No other host & no otherspore stage

Coleosporium sp. on Pine needles

Melampsora telia on underside of poplar leaf

Closeup 400X

Acial stage on Pinaceae,but is rarely found

Gymnosporanium telia

Broom rust of spruce

Telial state (not shown)on Chickweed(Stellaria)

True fir Broom rust (Melampsorella)

Uredinopsis on underside of Abies needle

Teliosporesembeded in a fern leaf