Observation 110153: Caloboletus marshii D. Arora, C.F. Schwarz & J.L. Frank

When: 2012-09-17

Collection location: Ives Park, Sebastopol, California, USA [Click for map]

Who: zack mikalonis (zackm)

No specimen available

big white boletes, most robust, a few with less robust stalks.
Obvious bluing, no reticulation that I could find.
These guys are a little old. I didn’t have a camera with me, but I think they are Ben’s Bitter’s.
Growing under live oak on the south bank of the creek walking through the park, at the corner of the parking lot.

UPDATE: I went back on the morning of the 19th, and I picked two individuals, i took them with me to Santa Cruz. This morning (the 20th) I had time to check them out and take some pictures. The smaller one blued instantly when cut or held, but slowly faded to tan/tea-stain/buff (pictures 1-5). The pores were yellow/green, bruised blue.
The larger individual had very dark pores. Both had inrolled margins of the cap, reminiscent of butter boletes, but they were not as dense as butters. Tan caps. The large one was cracked down the middle on top when I found it on the 17th which was blue, now it is tan. I cut it in half along that crack.

both were lemon-yellow at top of stipe, where it connects to cap. There was “reticulation” for about 1mm.
There was some small red spots in the lemon yellow in all individuals I found, then below the bright yellow section of the stipe they turned more buff/tan. Base of mushrooms seemed to be more schoolbus/lemon yellow with mycelium also yellow.

These two individuals were robust, but there were some other individuals nearby which had slender stalks, and were relatively red on the stipe near where it met the cap. they were also older, and many were parasitized with white fungi. They may or may not have been the same species, but I’ll be damned if I could think of any other bolete they could be.

All the specimens I found were old and getting a little gross in one way or another, I did not taste any.

As far as I know it has not rained on the park yet this season.
They were all under live oak in a section of landscaping raised above a creek, I did not see any signs of irrigation to the trees. They were growing in live oak leaf litter and some creeping viney plants.

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Excellent description
By: Christian (Christian Schwarz)
2012-09-21 10:34:17 PDT (-0700)

Thanks Zack!

Also found some…
By: Mushroom Viper
2012-09-20 14:44:01 PDT (-0700)

Just found a few of these in the Santa Cruz Mountains this weekend as well.

Created: 2012-09-17 13:48:37 PDT (-0700)
Last modified: 2014-10-27 12:52:02 PDT (-0700)
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