Observation 21419: Cronartium quercuum (Berk.) Miyabe ex Shirai
When: 2009-05-29
No herbarium specimen
0 Sequences

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 ).

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 07:44:16 PDT (-0700)

…not oak.

Created: 2009-05-29 21:28:02 PDT (-0700)
Last modified: 2013-05-31 14:52:13 PDT (-0700)
Viewed: 84 times, last viewed: 2017-06-05 20:58:23 PDT (-0700)
Show Log