Observation 52923: Climacocystis borealis (Fr.) Kotl. & Pouzar
When: 2010-09-14
45.801879° -77.138572°
No herbarium specimen
0 Sequences

Polypores growing on a log in Zone 48. Top has pinkish-orange tones here and there, and hairs; rest is cream-colored including the small, regular pores.

The conks are large enough and the pores small enough that they may have as many as 70,000 pores total among them. Conks are efficient little spore-droppers.

Species Lists


Nearly two weeks later. A large cap has reddish-gold droplets underneath.
Nearly two weeks later. A large cap has reddish-gold droplets underneath.
Good shot of resin drops and pores, October 2.

Proposed Names

-53% (5)
Recognized by sight
-58% (6)
Recognized by sight: Droplets on underside, zonate cap.
26% (6)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Didn’t touch them.
By: Paul Derbyshire (Twizzler)
2010-10-12 00:01:07 PDT (-0700)
By: Sporulator
2010-10-11 22:51:51 PDT (-0700)

Guttation drops can show all kind of colors, due to the metabolic
products of the mushroom. I don’t know if Climacocystis borealis
produces resins, but if those drops are really resins, they should
feel a bit sticky. Especially if you let some of the drops dry on a
piece of aluminum foil, the residue should feel quite sticky.

Guttation drops
By: Paul Derbyshire (Twizzler)
2010-10-11 15:25:30 PDT (-0700)

are clear. These are clearly not, and they are the exact color of resin.

Not resin drops
By: Sporulator
2010-10-10 00:38:46 PDT (-0700)

Looks like Climacocystis borealis. That species is very variable in appearance
and color; from whitish to yellowish. The smell is sweetish and pleasant.
In my opinion, those are not resin drops, but ordinary guttation drops,
due to high relative air humidity. Guttation means, an exudation of water
droplets to keep intact the hydrologic balance of a mushroom or plant.



By: Paul Derbyshire (Twizzler)
2010-10-09 23:32:07 PDT (-0700)


The term seems common in more technical talk; it just doesn’t seem to be defined anywhere.

By: Erin Page Blanchard (CureCat)
2010-10-09 22:49:21 PDT (-0700)

‘Tomentose’ is a pretty elementary term in mycology.

It means fuzzy, hairy, or tufted.

By: Paul Derbyshire (Twizzler)
2010-10-09 20:29:56 PDT (-0700)

1. The pores don’t seem that large to me. A millimeter across perhaps. See second-to-last photo.

2. Latin species names are one thing. Throwing around terms like “tomentose” without clearly defining them is another.

3. This is not an appropriate forum for launching personal attacks. Your opinion of what is and is not “tedious” is your own; may as well keep it to yourself.

not Ischnoderma..
By: doug (doug)
2010-10-09 18:14:30 PDT (-0700)

This has teeth, or huge pores, hard to tell by pics. Walt already addressed the droplets in the OB you read- Polyporus sp. P. Micheli ex Adans. (54957), saying that they occur on many polypores. I have also seen them on many different species. And the Latin he used is the same language that you use when speaking of trees, so i dont see the problem there.
If you already know what it is, why post it? How many times can you post D. palmatus and B citrina?…If everytime someone found this and posted to MO there would be lots of clutter. Its a little tedious.

By: Paul Derbyshire (Twizzler)
2010-10-09 15:07:10 PDT (-0700)
By: Paul Derbyshire (Twizzler)
2010-10-07 21:47:09 PDT (-0700)

Please speak English. We don’t all speak Latin around here you know.

I’ve seen I. resinosum at nearly the exact same spot before. This has the resin drops, and is developing pinkish tones in the caps.

Tomentose cap
By: walt sturgeon (Mycowalt)
2010-10-07 21:21:18 PDT (-0700)

Definitely not I. resinosum as I see it.

Seen the resin drops? Last photo.
By: Paul Derbyshire (Twizzler)
2010-09-30 00:59:54 PDT (-0700)

Created: 2010-09-14 22:05:46 PDT (-0700)
Last modified: 2011-05-24 17:05:07 PDT (-0700)
Viewed: 239 times, last viewed: 2017-11-19 05:56:47 PST (-0800)
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