Observation 65419: Hydnaceae sensu lato

When: 2011-04-06

Collection location: Rollins Lake, Nevada Co., California, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

large fruiting of this all along a downed log.

Species Lists


KOH turns flesh reddish purple.

Proposed Names

-63% (3)
Recognized by sight: Large, orange crusting fungus with toothlike projections.
Based on chemical features: turns reddish purple in KOH.
46% (2)
Recognized by sight: likely the same as Observation 116657 and Observation 68100
40% (3)
Recognized by sight
40% (3)
Recognized by sight
3% (3)
Recognized by sight: rare, orange toothed resupinate.
Used references: “California Mushrooms,” Desjardin et al, pg. 477.
Based on chemical features: KOH turns tissues purple-red.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
yeah …
By: Debbie Viess (amanitarita)
2015-03-20 00:01:46 IST (+0530)

I made that ID on the strength of the KOH rxn., before I saw all of Adolf’s wonderful photos.

Back to Zero.

having a hard time
By: Danny Newman (myxomop)
2015-03-19 23:46:11 IST (+0530)

reconciling this:

with the fungus pictured here. The Sierras may have Sierran forms of fungi found elsewhere in other guises, but this is altogether different.

I found the reference to the KOH rxn.
By: Debbie Viess (amanitarita)
2015-03-15 19:47:04 IST (+0530)

deep down in the comments of that obsie.

not always easy to find these things. perhaps it would be useful to put those salient details up in the obsie description header?

I agree that they are macro-morphologically the same, the similar KOH rxns. nails it.

I also have
By: Noah Siegel (Noah)
2015-03-15 06:31:40 IST (+0530)

KOH cherry red” on my Pycnoporellus collections and “rosy-purple at first, very soon deep vinaceous to vinaceous-black” for this collection; http://mushroomobserver.org/131569

Same as this
By: Noah Siegel (Noah)
2015-03-15 06:17:35 IST (+0530)

We had a number of collections of it; Vinaceous KOH Rxn.

on the other hand …
By: Debbie Viess (amanitarita)
2015-03-15 06:15:04 IST (+0530)

wet/dry pore proliferation aside, this does seem more toothed than pored.

did anyone else use KOH on their similar toothed fbs?

Sierran example of Pycnoporellus …
By: Debbie Viess (amanitarita)
2015-03-15 05:37:08 IST (+0530)

are a far different creature than the spectacular PNW forms.

what I show here is typical of the stunted examples of Pycnoporellus in the Sierra.

not entirely convinced.
By: Danny Newman (myxomop)
2013-10-13 11:59:13 IST (+0530)

spot on color-wise for H. olivacea, though the reaction to KOH is said to be dark brown or black. no mention of the purple seen here, which is, admittedly, closer to Pycnoporellus’ transition from red to black with application of same. The un-creamsicle color scheme and truncated teeth are what’s throwing me the most.

not just macromorph…
By: Debbie Viess (amanitarita)
2013-07-07 21:08:29 IST (+0530)

but chemical confirmation, too.

did anyone attempt to use KOH on the two similar collections?

Created: 2011-04-12 08:58:54 IST (+0530)
Last modified: 2016-02-02 03:22:43 IST (+0530)
Viewed: 187 times, last viewed: 2017-06-09 19:16:15 IST (+0530)
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