When: 2009-04-05

Collection location: Boone Co., Missouri, USA [Click for map]

Who: MOFunGuy (jrapp)

No specimen available

This was found this weekend (April 5th, 2009) in the Missouri River bottoms here in Central Missouri, consisting of mixed woods in moist sandy soil. You could see this bright florescent orange color a 1/2 mile away. It looks exactly like the marking paint used for construction. It appears to be a mold or crust-like fungus. I really don’t think this thing is rare or unusual.

I’ve looked in all my reference books with no luck. When I Google Search, I found several similar pictures posted, all also asking for ID help. I contacted Clive Shirley who has about the neatest website for Slime Mold,(http://www.hiddenforest.co.nz/index.htm) thinking he’d easily recognize it. Unfortunately he wasn’t sure what it is.

So strip off my bark and rot my heartwood, I guess I’m stumped !!!

Any ID help would be much appreciated.


[admin – Sat Aug 14 01:58:46 +0000 2010]: Changed location name from ‘Boone Co., (Central) Missouri, USA’ to ‘Boone Co., Missouri, USA’

Species Lists


Proposed Names

51% (3)
Used references: This note was fowarded to me by mycologist Jay Justice:

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

= Observer’s choice
= Current consensus


Add Comment
What goes around comes around
By: Patrick Harvey (pg_harvey)
2012-04-24 01:37:52 CST (+0800)

Thanks for the reference!

An overview of the taxonomy, phylogeny, and typification of nectriaceous fungi in
Cosmospora, Acremonium, Fusarium, Stilbella, and Volutella

T. Gräfenhan1, 4*, H.-J. Schroers2, H.I. Nirenberg3 and K.A. Seifert1

more info
By: MOFunGuy (jrapp)
2012-04-24 00:05:52 CST (+0800)
Additional Observations
By: Wayne (waynehughes)
2010-02-10 22:19:00 CST (+0800)

A year ago I was also drawn by the appearance of a bright orange smear on a dead box elder above Goulding Creek in west Oglethorpe County (near Athens, Georgia, US). That post appeared eleven days earlier, so I didn’t benefit from these great observations.

One thing I noticed was that there were distinctive hollow tubular white structures in the upper areas of the orange emergence (seen in the second photo at the link above), and I see them in the second photo on this post as well. The area around them was attended by small flies (unidentified). It had struck me that this was very stinkhorn-like, but stinkhorns are basidiomycetes and Fusarium is an ascomycete so perhaps there’s no connection.

Since then I’ve also seen a similar emergence (Jan 25 2010) on a living black walnut (here).

Thanks for the observation and discussion.

“Deer Vomit” Fungus Notes
By: Patrick Harvey (pg_harvey)
2009-04-09 03:00:18 CST (+0800)

Here are a couple of notes from mycologist Jay Justice:

Deer vomit fungus – not a slime mold but a fusarium species. I can’t
find the species at this time.


Found this on the web. Bruce Horn was the mycologist that told me what
this fungus was several years ago.


The occurrence of fusarium merismoides var. chlamydosporale
(tuberculariaceae) in Rankin County, Mississippi.

Article from:
Journal of the Mississippi Academy of Sciences
Article date:
April 1, 2003
Dukes, George H., Jr. ; McGuire, Gerald M., II ; Jackson, Dionne ;
McGuire, Sarah Lea
More results for:
fusarium species on wild grape vines | Copyright
informationCOPYRIGHT 2003 Mississippi Academy of Sciences. This material
is published under license from the publisher through the Gale Group,
Farmington Hills, Michigan. All inquiries regarding rights should be
directed to the Gale Group. (Hide copyright information)

This report documents the first occurrence of the fungus Fusarium
merismoides var. chlamydosporale (Tuberculariaceae; Ascomycota) in
Mississippi. The presence of this fungus was first observed in a rural
area of Rankin County, Mississippi (Section 9, Township 3N, Range 5E) in
March 2000, as a very wet, brilliant orange mass growing on a wild grape
vine ( Vitis sp.; Vitaceae). The fungus re-appeared on the same vine in
March 2001, and March 2002, lasting for approximately 3 weeks at each
occurrence. It was also found growing on a second host, ironwood (Ostrya
virginiana; Betulaceae), in March 2001, and March 2002.

Samples were collected from both hosts during 2001 and 2002 …

Could it be
By: Irene Andersson (irenea)
2009-04-09 02:36:26 CST (+0800)

sap from a wounded tree?

More opinions pending
By: Patrick Harvey (pg_harvey)
2009-04-09 02:01:05 CST (+0800)

Hey MoFunGuy

I passed a link to your observation to some more people for an opinion on
it. I don’t have a clue …

— Feral Boy