Observation 216176: Hapalopilus croceus (Pers.) Donk
When: 2015-09-12

Notes: This specimen was big and bright orange enough to be seen from 20 feet through the brush. Fruiting on a large rotted, bark-less log of undetermined species. Primary tree associates: Oak and Hickory. Fruit body: 34 cm. X 22.5 cm. X 6 cm. deep at thickest point, spongy, moist. Weight: 5 lbs. Pores average 2/mm. Tube length 2 cm. Context 4 cm. deep. KOH initially red on all surfaces, then after 1-2 minutes changes were as follows: upper surface reddish-purple; context purplish-red/deep violet; tubes and pore surface burgundy-red. Although I have been unable to find any information on spore color, I was able to obtain enough of a spore print to call them white. Hoping to get more yet. I will voucher this specimen for the Missouri Mycological Society’s herbarium and will update this ob. when DNA results are returned.


Copyright © 2015 Judi Thomas
Copyright © 2015 Judi Thomas
Pore surface in situ.
Copyright © 2015 Judi Thomas
Pore surface and point of attachment.
Copyright © 2015 Judi Thomas
Cross-section and upper surface.
Copyright © 2015 Judi Thomas
In situ
Copyright © 2015 Judi Thomas
KOH on non-fertile surface.
Copyright © 2015 Judi Thomas
KOH on pore surface.
Copyright © 2015 Judi Thomas
KOH on context.

Proposed Names

57% (1)
Eye3 Eyes3
Used references: Special thanks to John Harper for his exceptionally detailed and thorough observation (MO Ob. # 108665) and for providing the link in that ob. to Tom Volk’s online description of this polypore. See John’s ob. for additional links.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks, Sylvia. Microscopy scheduled
By: Judi T. (AvidAmateur)
2016-01-07 10:07:39 CST (-0500)

for 1/12/16 with DNA to follow.

By: weed lady (Sylvia )
2016-01-07 08:38:42 CST (-0500)

Nice detail on this observation.

Thanks, Patrick. Saw your ob. from Tyson in 2013.
By: Judi T. (AvidAmateur)
2015-09-15 14:10:14 CDT (-0400)

These guys are pretty uncommon around here, I guess. There were lots of itty, bitty babies on this log, so maybe I’ll be able to see them again when I return the that location.

Put some potassium hydroxide (KOH) on it
By: Patrick Harvey (pg_harvey)
2015-09-15 13:54:35 CDT (-0400)

It will turn bright purple!

Created: 2015-09-15 13:34:45 CDT (-0400)
Last modified: 2015-09-15 14:06:08 CDT (-0400)
Viewed: 66 times, last viewed: 2016-10-21 11:58:45 CDT (-0400)
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