Observation 28730: Caulorhiza umbonata (Peck) Lennox

near huckleberry in mixed hardwood woods.


a forest of giant cystidia
amyloid spores look roughened in this view. enlarge to see.

Proposed Names

-12% (3)
Recognized by sight: here’s an oddity for y’all…it was growing in the path, and already trampled upon by joggers/hikers/bikers/pigs so I didn’t feel too badly about collecting the bits and pieces. Note raised, striate cap, broadly notched pale gills, extremely long rooting stipe and apparently cigar brown spores (didn’t get a very good print).
Based on microscopic features: will scope today.
31% (3)
Recognized by sight: second shot looks kinda like it , but spores would be white.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Erin Page Blanchard (CureCat)
2009-11-25 22:13:32 PST (-0800)

You’re funny. I have seen C. umbonata grow from redwood litter, where no trees were nearby. But that is not too unusual… Then another time, I found one in a REALLY unusual place. It was absolutely C. umbonata, a very typical collection at that. Except for the location, which was under a broad leaf tree, with hard, packed, dry, sandy soil, and almost no leaf litter on top. There were no other trees immediately nearby.

So I am not terribly surprised… C. umbonata does not seem bound with Redwood from what I have seen. But maybe it is, and I am just missing some detail.

Anyway, I would describe the caps of these as rugose rather than striate. Maybe striate when wet though? Not sure.

I have been finding a lot of C. umbonata with rugose caps. I will make an observation of a recent collection.

I was all set to argue this ID.
By: Debbie Viess (amanitarita)
2009-11-25 21:58:50 PST (-0800)

then I scoped it, and darn it, it’s a pretty good match:
spores MAY be smooth (context confuses the issue); definitely amyloid; size fits: 5.5-7 × 3-4, with a forest of monster cystidia along the gill faces.

no redwood around, tho. and really small fruit bodies. and not very glabrous on the cap. and cap striate to the edge even when fully mature. here come the micrographs…

Created: 2009-11-25 08:08:05 PST (-0800)
Last modified: 2009-11-25 08:08:05 PST (-0800)
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