Observation 145310: Rhizina Fr.

When: 2013-09-12

Collection location: White Mountains near Greer, Arizona, USA [Click for map]


Who: Les Braund (knoahsarcLes )

No specimen available

I found these in a recent burn area. At first I thought it was a pile of dog poop. I first touched it with a stick. It sounded hollow. These are about 3 inches high and vary from 2-3 inches across. I have never seen anything like these. I looked at the spores and in water they had tips see photo. When seen in KOH the tips are gone. Can you help me identify these.

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hi Les…thanks for responding.
By: Debbie Viess (amanitarita)
2013-09-15 12:23:15 PDT (-0700)

a micrograph is just a photo thru a microscope…you do have one posted here, but I didn’t see it the first time I looked.

Those spores do resemble Rhizina.

If you can, try and get some more photos of the micro-structures: some sp. of Rhizina have setae, which are dark, elongated, non-septate (no cross walls within the cell),thick-walled structures with blunt tips, and all ascos have paraphyses, elongated, sterile hyphae that are interspersed among the asci and are parallel to them.

Details of these structures can be species specific, and can help us get to a better ID.

Reply to your request
By: Les Braund (knoahsarcLes )
2013-09-15 11:26:20 PDT (-0700)

Pips are the result of bad hand writing the word should be tips. I’m sorry but I don’t know what a micrograph is. I am not a scientist.

I am sending along more photos of the bottom side and the spores. The first two photos are of the bottom. The first photo of the spores is in water and there appears to be tips at the ends . In the second photo using KOH the tips appear to be gone.

I have several pieces of these things in my freezer. I thawed one out and it retained it’s color and texture.


odd indeed.
By: Debbie Viess (amanitarita)
2013-09-13 07:36:54 PDT (-0700)

why no micrograph? obviously you did use a scope and you have a camera.

what are “pips” ?

Did they have short stipes? I can’t tell from your photo. Rhizina are prostrate.

More detailed microscopy would help here.

Created: 2013-09-12 20:47:53 PDT (-0700)
Last modified: 2013-09-13 07:33:28 PDT (-0700)
Viewed: 47 times, last viewed: 2017-06-16 10:57:43 PDT (-0700)
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