Observation 109221: Phaeocollybia christinae (Fr.) R. Heim

Initially, I could find no report of Phaecollybia species being found around here. But these key out very well to this genus.

Stipe/taproot mostly buried.

Stipe flexible/cartilaginous.

Rusty orange spore print.

Mixed hardwoods with some hemlock. Near a stream.

Proposed Names

58% (1)
Recognized by sight
59% (2)
Used references: MO, observations made in Maine. Other internet sources report this as an eastern NA species. Spore size seems to fit one of these reports.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


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Walt, in the Phaeocollybia book by Norvell & Exeter,
By: Ron Pastorino (Ronpast)
2016-02-04 20:40:00 CST (-0500)

They list the “World species of Phaeocollybia” and while P. rufipes is listed separately, it is followed by the notation “(questionable)”.

Walt, your observation…
By: Dave W (Dave W)
2016-02-04 08:00:38 CST (-0500)

as well as other MO observations for P. christinae look like a match for this one. Your description of the habitat matches this observation. Hemlock/birch woods (some other hardwoods), near a stream, sandy soil.

I wonder if the spore dimensions found in the field guides are the result of info relevant to some other species which has been passed down from guide to guide…?

This is classic
By: walt sturgeon (Mycowalt)
2016-02-04 00:27:51 CST (-0500)

Phaeocollybia christinae which was called Phaeocollybia rufipes. I have seen it in SW Pa. under hemlock along a stream and in Quebec. As far as I know this is the only Eastern North America species.

It is interesting that Index Fungorum has P. rufipes and P. christinae as distinct. I think they are synonyms.

Sounds good Dave,
By: Ron Pastorino (Ronpast)
2016-02-04 00:11:56 CST (-0500)

With those small spores, there are not too many PNW species that might be comparable. Besides the two I mentioned before, there is a small species with similar looking macroscopic features….P. radicata with spores 4.7-6.2 X 2.8-4.1 microns, with minutely punctate roughened ornamentation. They are known to grow with western Hemlock and Douglas-fir.

After making my +17% adjustment…
By: Dave W (Dave W)
2016-02-03 23:03:55 CST (-0500)

none of the spores in the photo exceed 6 mu in length.

The +17% is a correction estimate I arrived at via many comparisons of observed/recorded spore dimensions for species about which I was certain.

Thanks Dave,
By: Ron Pastorino (Ronpast)
2016-02-03 22:52:10 CST (-0500)

Yes, I was just pointing out that the information in the older Phillip’s book about the PNW P. christinae was actually another species based on more current information.
What Dave has is most likely something other than P. christinae….assuming he has high confidence in his spore measurement data.

Phil, look at my initial comment.
By: Dave W (Dave W)
2016-02-03 20:57:10 CST (-0500)

Phillips mentions P. christinae as a species found in both eastern and western NA, with a small-spored version found in the west. The ones in this observation have much smaller spores than what is reported for the eastern NA type.

By: Phil Yeager (gunchky)
2016-02-03 19:02:45 CST (-0500)

I must be missing something. Dave posts this as found in Pa., while you speak of this species not being found in the Northwest. I’m lost as to what you are attempting to convey. Need help here.

Thanks, Ron.
By: Dave W (Dave W)
2016-02-03 14:01:51 CST (-0500)

This makes things ever a bit more interesting. For the spores obtained from the ones in this post are significantly smaller than what is reported for the eastern NA species P. christinae.

According to Norvell & Exeter in
By: Ron Pastorino (Ronpast)
2016-02-03 10:38:25 CST (-0500)

Phaeocollybia of Pacific Northwest North America, Phaeocollybia christinae does not occur in the PNW.
You probably have something different.
Similar species with small spores found in the PNW are P. sipei and P. dissilens.

Champignons du Quebec…
By: Dave W (Dave W)
2016-02-03 08:09:41 CST (-0500)

puts the spore size for P. christinae at 7-10 × 4-5.5. Phillips says the dimensions are 8.7-9.8 × 4.7-5.3, but that collections from the Pacific Northwest NA have smaller spores 5-6 × 3.5-3.8. This is interesting because the spores seen in this observation, which comes from NE NA, match the smaller size mentioned by Phillips. (Increase apparent dimensions as seen in photo by 17%.)

Created: 2012-09-09 22:11:21 CDT (-0400)
Last modified: 2017-12-28 23:16:02 CST (-0500)
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