Observation 68405: Gymnosporangium libocedri (Henn.) F. Kern

When: 2011-05-27

Collection location: Eastern Shasta-Trinity National Forest, Siskiyou Co., California, USA [Click for map]

Who: Byrain

No specimen available

Found on living Incense-cedar (Calocedrus decurrens) foliage.



Proposed Names

25% (1)
Recognized by sight
92% (2)
Recognized by sight: The gelantinous telial stage of Incense-Cedar Rust.
Used references: Bega, R. V. 1978. Diseases of Pacific Coast Conifers. Agriculture Handbook No. 521. U. S. Gov’t. Printing Office, Washington D. C. 206p. (Color photo p. 112.)

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
2nd photo is very helpful
By: Martin Livezey (MLivezey)
2011-06-01 08:07:30 WIB (+0700)

I agree with your comment that this fungus appeared to be fruiting differently. The G. j-v does not disappear in a day…,

Another photo added
By: Byrain
2011-05-31 21:00:34 WIB (+0700)

I added the only other photo I have. The fungus completely covered the young tree. I found it once more next to camp on an even younger incense-cedar. Though it disappeared by the next day.

I have heard of Gymnosporangium juniperi-virginianae, this fungus seems to be fruiting in a different manner. More so resembling the Guepiniopsis alpina that was everywhere. Though I wouldn’t know of any other options.

Any chance of another photo?
By: Martin Livezey (MLivezey)
2011-05-31 20:51:18 WIB (+0700)

There is not much info here…., Have you looked at ‘Gymnosporangium juniperi-virginianae Schweinitz’ ?

Created: 2011-05-31 17:01:23 WIB (+0700)
Last modified: 2011-06-02 18:29:42 WIB (+0700)
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