Observation 20624: Fulvifomes robiniae (Murrill) Murrill

When: 2009-04-26

Collection location: Cuivre River State Park, Missouri, USA [Click for map]

Who: Patrick Harvey (pg_harvey)

No specimen available


[admin – Sat Aug 14 01:59:46 +0000 2010]: Changed location name from ‘Cuivre River State Park, Missouri’ to ‘Cuivre River State Park, Missouri, USA

Species Lists



Proposed Names

30% (3)
Recognized by sight: looks like a phellinus
53% (3)
Recognized by sight: if growing on locust (looks like it might be) this is a possibility
43% (3)
Recognized by sight: If the id 5257 photo 8923 is rimosus then this one is also a Phellinus rimosus. The one in NC is also on a locust.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Black Locust
By: Noah Siegel (Noah)
2009-05-09 15:19:41 CDT (-0400)

only has small spines on young twigs, if you are ever back at this location photograph the tree.

Comment from another user
By: Patrick Harvey (pg_harvey)
2009-05-09 12:01:17 CDT (-0400)

Re: Phellinus‏
From: S Yi …

Very nice specimen. Okay, no thorns, not a locust, then not likely a Phellinus robinea. Robinea was named after Jean Robin who populated locusts in Europe. So likely, its a P. rimosus. Rimosus is latin word for “cracked”, describing its cracked cap, hence the name Phellinus rimosus.

Did the tree look like it was dying or decaying? or did it look healthy. How high up the tree was it growing? What was its approximate diameter?

Like Tom Volk said many Phellinus are very difficult distinguish, but this one is a very nice one.
Ones I’ve seen are not as handsome as this one you photographed.


It was growing about 3’ up the trunk. The tree seemed to be in good shape.
I’ll take your suggestion of P. rimosus, Irene mentioned a cracked cap in
her comment. Thanks for all of your help!

— Patrick

host tree is very important
By: Tom Volk (TomVolk)
2009-05-07 23:04:32 CDT (-0400)

Many Phellinus species are restricted to a particular tree species. It’s hard to tell what the host is from the bark, but I suspect black locust, which would make this Phellinus robineae. The species of Phellinus are very difficult, near impossible without a microscope (and tricky even with one), but host tree helps alot.

Re: Phellinus
By: Patrick Harvey (pg_harvey)
2009-04-27 17:35:29 CDT (-0400)

Thanks, Irene. I’ve also noticed looking at the picture again that the underside is not pure white, almost a tan in some areas.

By: Irene Andersson (irenea)
2009-04-27 17:29:37 CDT (-0400)

Ganoderma species usually don’t get a cracked cap surface like this, just wrinkled.

Name Proposal
By: Patrick Harvey (pg_harvey)
2009-04-27 12:15:44 CDT (-0400)

Hello Amanita Virosa —

What distinguishes Phellinus from G. applanatum? I’m not that familiar with

Created: 2009-04-26 17:28:01 CDT (-0400)
Last modified: 2016-07-28 23:25:17 CDT (-0400)
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