Observation 170805: Pisolithus Alb. & Schwein.
When: 2014-07-21
Herbarium specimen reported

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Pisolithus
By: Daniel B. Wheeler (Tuberale)
2014-07-23 14:15:58 CDT (-0400)

is widely mycorrhizal. Associates with nearly everything, according to Kuo. It is mycorrhizal with Douglas-fir, Pinus, Quercus, Populus, Alnus, Tsuga, Abies, Corylus, etc.. Hickory is likely. Also known as Pisolithus tinctorius, as least in Western U.S.

Until the splitters found DNA differences with Eucalyptus Pisolithus, didn’t much worry about species. Most proposed species seem are associated with Australian or African trees, not often found in the US.

Oak
By: walt sturgeon (Mycowalt)
2014-07-23 09:19:46 CDT (-0400)

was the most likely associated tree which fits with P. arhizus which also associates with Pinus spp. I do not know what other species are probable in Ohio.

Oak, hickory or wild cherry
By: Daniel B. Wheeler (Tuberale)
2014-07-23 00:09:15 CDT (-0400)

could be potential hosts. Was oak the nearest possibility? I’d suggest oak as the most common mycorrhizal host plant, although I don’t usually find Pisolithus with it in Oregon. (I wonder why? Common elsewhere.)

Any other other Pisolithus in Ohio, Walt? I’m glad you didn’t get “stained”.

Pisolithus was the first mycorrhizal fungi I grew in 1985. I got a sporocarp from OMS, and tried growing it with birch in my front yard. A year after inoculation, a sporocarp appeared no more than 4 feet away from the trunk. Now know it only takes about 120 spores to colonize a seedling tree. But at the time, I spread a whole quart of Pisolithus slurry around the birch. Average Pisolithus produces about 1,000,000+ spores, so may have been a little overkill. Tree grew from a seedling in 1985 to 15 feet tall in 3 years, which is why I had to cut it down: way too much tree for 6 inches from my house and driveway. I’ve since heard of Pisolithus pushing up asphalt and concrete in California, so it probably was just as well.

Handled with care
By: walt sturgeon (Mycowalt)
2014-07-22 09:17:34 CDT (-0400)

so no inky fingers. It was on the trail in a broadleaf forest of mostly oak but with hickory, wild cherry and maple. It is on the drier.

Certainly Pisolithus.
By: Daniel B. Wheeler (Tuberale)
2014-07-22 01:55:58 CDT (-0400)

But this common mycorrhizal fungus needs a host shrub, tree, or herbaceous plant. What else was growing nearby, Walt?

Interesting blue coloration near bottom of fungus in photos 2 and 3: rarely seen. Are your hands still dyed?

Created: 2014-07-21 19:59:36 CDT (-0400)
Last modified: 2014-07-22 09:14:52 CDT (-0400)
Viewed: 41 times, last viewed: 2016-10-28 20:43:34 CDT (-0400)
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