Observation 144677: Cumminsiella mirabilissima (Peck) Nannf.
When: 2013-09-05
No herbarium specimen

Notes: On Mahonia aquistifolium, Tall Oregon grape, Oregon’s state flower.

Phyllosticta forms small black dots on the front of the leaf, and black sporangia on the underside.

Images

364204
Mature Oregon grape leaves are leathery and not pliant. Look for the black dots.
364205
Black sporangia on the underside of the leaf.
364206
Multiple black dots on anothrer leaf.
364207
Reverse of infected leaf.

Proposed Names

29% (1)
Eye3
Recognized by sight
56% (1)
Eyes3
Recognized by sight: look at my own observations, I think this is an early stage of this common Mahonia rust that is abundant in Europe although introduced

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2013-09-05 21:39:42 CDT (-0400)
Last modified: 2013-09-07 06:36:37 CDT (-0400)
Viewed: 23 times, last viewed: 2016-10-28 14:44:23 CDT (-0400)
Show Log