Observation 24953: Boletus rhodosanguineus Both
When: 2009-09-02
Herbarium specimen reported

Notes: The cap is mostly brown but has distinctive olive coloration and patches of pink. The stalk is bright yellow near the apex with bright red, vein-like reticulation near the top that blends into the purple-red lower portion of the stalk. The outside of the stalk bruises a cool olive-blue color. The pore surface is red on mature mushrooms and it bruises dark blue. The pileus tastes mildly sweet and when ripped, smells of over-ripe fruit.

Spore print is olive-brown.

These were found on a steep slope in sandy soil under Oak and Birch.

[admin – Sat Aug 14 02:01:09 +0000 2010]: Changed location name from ‘Hixon Forest, La Crosse, WI’ to ‘Hixon Forest, La Crosse, Wisconsin, USA

Proposed Names

93% (3)
Eye3 Eyes3
Used references: Keyed out using North American Boletes (Bessette, Roody, Bessette)
Based on microscopic features: Average spore size 10-15um x 4.5-5.5um
Based on chemical features: NH4OH was placed on the context of the cap, the effect was that it cleared the blue back to the original yellow color. When KOH was dripped onto the context it changed it to a pale orange color, and the tubes were changed from blue to bright red.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Driftless area
By: Tom Volk (TomVolk)
2009-09-04 23:17:31 CDT (-0400)

We have found quite a few disjunct distributions of fungi in the driftless area here in our corner of Wisconsin— where the glaciers missed us 10,000 years ago. It’s a very interesting mycological place.

another neat bolete!
By: Debbie Viess (amanitarita)
2009-09-04 14:29:08 CDT (-0400)

nice, thorough work-up too, Matthew; very useful to us future finders of out-of-the-ordinary mushrooms.

Might want to send a link to this sighting to Bill Roody; apparently, you have expanded the known range of this one, at least as listed in the Bessettes Big Book o Boletes.

Created: 2009-09-04 14:06:01 CDT (-0400)
Last modified: 2016-08-26 13:54:14 CDT (-0400)
Viewed: 239 times, last viewed: 2016-10-24 10:27:11 CDT (-0400)
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