Observation 79405: Toxicodendron diversilobum
When: 2011-09-15
No herbarium specimen

Notes: This thread-like organism appeared on the stems on a single bush of poison oak in August (possibly earlier). It is growing directly out of the stem. At the base of each thread-like projection there is a little bump. The threads are grouped together in patches that occur on several branches. It is the color of a cock’s comb and is fleshy like a moist Phlogiotus. I don’t even know if it’s a fungus but I haven’t had any luck looking at potential diseases or insect-caused growths. Any ideas?

The photo shows what it looked like in mid September. It is starting to dry out now.

Proposed Names

24% (2)
Recognized by sight: I agree with you, Martin. Poison oak forms aerial suckers; these must be them at a young age.
93% (3)
Recognized by sight: from what i understand, radicans is poison ivy, diversilobum is our local poison oak

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
you are correct, Sir…
By: Debbie Viess (amanitarita)
2011-10-13 12:35:50 CDT (-0500)

I am no botanist! ;)

nice find, even if a plant…
By: Debbie Viess (amanitarita)
2011-10-12 20:44:50 CDT (-0500)

I have never seen this stage of poison oak.

If poison oak is like poison ivy
By: Martin Livezey (MLivezey)
2011-10-12 19:10:30 CDT (-0500)

I would say those are roots! probably not fungi…,

Created: 2011-10-12 19:05:22 CDT (-0500)
Last modified: 2011-10-13 14:18:57 CDT (-0500)
Viewed: 150 times, last viewed: 2016-11-30 11:06:53 CST (-0600)
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