Observation 21419: Cronartium quercuum (Berk.) Miyabe ex Shirai

When: 2009-05-29

Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]

Who: Paul Derbyshire (Twizzler)

No specimen available

I’m not even sure this is a fungus. It’s enclosing a twig found in Zone 15, the jack pine stand that produced all those trichs and boletes last fall.

First photo is a thumbnail made from the second. A much higher resolution picture of this stuff can be had from my similar find in Zone 12 ( http://www.mushroomobserver.org/21423 ).

Species Lists



Proposed Names

33% (2)
Used references: Ziller, W. G. 1974. The Tree Rusts of Western Canada. Canadian Forestry Service Pub. No. 1329. Pacific Forest Research Centre, Victoria, B. C. 272p.
55% (1)
Recognized by sight: Eastern
Used references: Westcott’s Plant Disease Handbook 7th Edition

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
It was on jack pine…
By: Paul Derbyshire (Twizzler)
2014-05-07 23:44:16 JST (+0900)

…not oak.

Created: 2009-05-30 13:28:02 JST (+0900)
Last modified: 2013-06-01 06:52:13 JST (+0900)
Viewed: 102 times, last viewed: 2018-05-26 09:36:50 JST (+0900)
Show Log