Observation 15539: Abortiporus biennis (Bull.) Singer
When: 2008-09-03
No herbarium specimen

Notes: O.K. gang, since this is now our off-season for hunting mushrooms, I have a chance to work on ID’s. I’ve looked thru all my references and really don’t have this strange creature nailed down. So here goes …

This was found Sept 3rd, 2008 in Boone Co. (Central) Missouri on a grassy slope between a gravel path and a mixed hardwood forest area. It is approximately 3-4" tall, 2-3" across. I didn’t dig it up. I don’t have a sample, and didn’t get spore print.

It looks like a funnel-shaped mushroom with another fungus growing on it. It appears to grow around grass with the result of blades of grass sticking thru it. The under surface appears to be solid white pores in an irregular or maze-like pattern. The upper surface is white becoming a gelatinous, hairy flesh color towards the center. The lower stalk area appears covered with this same gelatinous, hairy flesh-colored material.

The closest resemblance I could find is Tremella concrescens which is a jelly which grows around stems, leaves, twigs, etc. (Ref. Bessette (2) & Fishcer, p. 433 (text) and p. 436 (picture)) However this specimen has a definite (funnel) shape, and the jelly doesn’t, on it’s own. Perhaps this is growing on a funnel-shaped mushroom such as a Clitocybe or a vase-shaped polypore, but I could find no mention of this jelly growing on other mushrooms.

Other possibilities I could find were Caloporus dichrous (Ref. Audubon p.449) which is pinkish buff and white colored, but the cap is said to be white with the tubes being pinkish buff. The ‘Candied (Apricot) Jelly Fungus’ or Phologiotis helvelloides is another possibility with a funnel shape and gelatinous flesh, except that is said to be found under confir (Ref. Phillips p.300). Finally, the ‘Orange Peel Fungus’ or Aleuria aurantia has a fleshy surface and can be whitish (Ref. Phillips p.306). But none of these possibilities really seem to fit.

So, M.O. community, whadya think ???

Thanks for you consideration.


[admin – Sat Aug 14 01:58:45 +0000 2010]: Changed location name from ‘Boone Co., (Central) Missouri, USA’ to ‘Boone Co., Missouri, USA

Proposed Names

54% (1)
Recognized by sight
Used references
56% (1)
Recognized by sight: Indeterminate growth is not seen in Inonotus.

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Add Comment
Thanks Tuberale !
By: MOFunGuy (jrapp)
2008-12-22 19:22:40 PST (-0800)

I think the closest Jelly Fungus is Phologiotis helvelloides.

I’ve received some helpful feedback from other observers that suggest strongly that this the funnel shaped polypore is Inonotus tomentosus or ‘Wooly Velvet Polypore’ with the jelly fungus Tremella concrescens growing on it. The only questions I haven’t fully answered is whether T. concrescens has been found growing on other mushrooms and whether it could account for the flesh coloration. I believe this jelly will grow on darn near anything that it comes across, and well could cause disintegration of the original brown-colored material of the I. tomentosus.

What do you all think ???


By: Daniel B. Wheeler (Tuberale)
2008-12-19 18:09:04 PST (-0800)

Don’t have my books in front of me (dangerous) but this looks like a Phleg- something. Phlegiotus? Something like that?

Inonotus tomentosus ???
By: MOFunGuy (jrapp)
2008-12-19 17:16:52 PST (-0800)

I’ve received some suggestion that this may be Inonotus tomentosus, the ‘Wooly Velvet Polypore’ or a Pine Root Rot fungus. The references that I have seen show quite a variation in characteristics, however some show a funnel shape, a brownish upper surface and white pored under surface, with a brownish collar around the base of the stalk/vase.


Audubon picture 448, text p. 471

Arora’s MD p. 569-70

About the only feature I haven’t accounted for is the jelly like substance in the fella I pictured. It is anything but dry & wooly, but it does have a hairiness to it.

Whadya think?


Created: 2008-12-18 13:02:28 PST (-0800)
Last modified: 2010-08-26 18:33:57 PDT (-0700)
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