Notes: The most distinctive feature of Gastroboletus turbinatus is the extremely fast (less than 1 second) blueing of any cut surface, especially any portion of the stipe. Color change seems to be in response to oxygen in the atmosphere. Stip changes from straw/orange to dark purplish/blue. I have tried to capture that change on film, but the process is too fast for my reflexes. Blueing continues for at least 10 seconds, becoming darker until the maximum is reached about 10 seconds later. Pores are convoluted and twisted, rarely allowing any spores egress; stipe is present, noticeably larger/thicker at the base than where attached to the cap. Size varies considerably from less than 1 inch across the cap to over 4 inches; usually barely erumpent in duff but in age can be completely above ground; spore mass may be nearly completely covered as in a button mushroom (especially when young); or exposed to the air in age. Often found barely visible in the duff/humus layer, somtimes with a cap of humus on top of sporocarp.
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sum(score * weight) /
(total weight + 1)
Created: 2008-08-08 13:32:30 CDT (-0400)
Last modified: 2008-08-08 13:32:30 CDT (-0400)
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