When: 2008-11-17

Collection location: Larch Mountain, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

Specimen available

I think this is Gastroboletus. But with this long a stipe (nearly 3 inches long!), it is nearly impossible to be sure until microscopy has been done. This specimen is currently being dehydrated, and will be added to ths OSU Herbarium. Found near the top of Larch Mountain growing off a large well-rotted Noble fir log without any bark left on it. The stipe is 3 inches long, and the lower inch is bright yellow but the extreme base (last 1/4 inch or so) composed of white matted rhizomorphs separating into distinct white rhizomorphs extending at least 1/2 inch from the stipe. Portion of stipe above log surface is striate brownish-red (i.e. mostly red with some brown areas under certain lighting conditions), annulus present, dark brown, just underneath cap attachment. Much of the stipe appears hollow, but I’m going to leave the stipe whole for further researchers to check. Flesh of cap yellow to straw-colored, staining red when cut. Top of cap felty red, with some brown fibrils mixed in; rim of cap upturned, dark red or nearly black red. Tubes are complex, mostly sealed/closed, but with some open to the air, moist to the touch. Trying to get spore print now, but don’t have much hope. Most Gastroboletus I’ve been exposed to have more complex tubes that stain quickly blue. Assuming this is a Gastroboletus, it is a species unknown to me at this time.


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Add Comment
Similar to Chalciporus piperatus
By: Daniel B. Wheeler (Tuberale)
2008-11-21 09:12:34 CST (+0800)

But at least in Smith, Smith & Weber, not an exact fit. The problem remains the pores not being open. A gastroid form of C. piperatus might be possible, but I know of none. Will be taking it with me to the NATS dinner.

gastroid bolete
By: walt sturgeon (Mycowalt)
2008-11-18 08:40:15 CST (+0800)

Looks like a gastroid Chalciporus.