Observation 286124: Boletus peckii Frost
When: 2017-07-27

Notes: > Alright, I am going to call this bolete B. peckii because that’s the most likely ID in light of all peckii posts on MO and the general information about this species found therein and in literature.
> This is the third time I am finding this bolete at this location (but apparently not the same spot); the previous posts are obs 73921 from 2011 and obs 104302 from 2012. Unfortunately, the first two collections were not saved.
> Unlike my benchmark peckii from Meadowoods, obs 246697, the three collections from Bernardsville always turned out to be small mushrooms with thick, pulvinate caps and short, equal or slightly ventricose stipes (about the same length as cap diameter on average) with a narrow base. It’s not clear if this is some kind of clinal variation, or stunted growth due to the ecology and/or modest levels of moisture, or that I just happen to invariably catch them at the same stage of development. The habitat is short grass & moss under old oaks.
> This particular example, collected by me on my way to the NEMF Foray in VT, had an out of round cap of 5.5 × 6.3 cm in diameter and a 5 cm long stipe, certainly not even a medium-sized fruitbody in the kingdom of boletes. The cap was 1.5 cm think in the middle; the tubes were 6 mm long in the middle; the stipe was 1.5 cm wide at the narrowest point (closer to the apex) and 1.8 cm wide near the base.
> The pictures give an accurate account of the colors. The cap was originally rose-red but turned brown from the disk toward the margins (the original color can still be seen near the margins). The stipe is a mixture of pink and pale yellow tones. The first 5 pix were taken in situ; the remaining photos were snapped the next morning after the mushroom was refrigerated overnight in a wax paper bag.
> I did not taste the flesh or run any chemical tests.
> This collection has been preserved and is scheduled for sequencing (TEF-1) in the fall.

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Comments

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Scott,
By: I. G. Safonov (IGSafonov)
2017-08-16 15:47:02 PDT (-0700)

Yes, I do. ‘Leaning’ is a good word. The morphology, bitter taste and sequencing all plausibly point toward 246697 being a Caloboletus.
Now, this collection (286124) needs to be sequenced before drawing any further conclusions about its identity/taxonomy.

Are you still leaning toward treating this as a Caloboletus?
By: Scott Pavelle (Scott Pavelle)
2017-08-16 14:30:38 PDT (-0700)

I remember some discussion about that last year.

Created: 2017-08-12 19:28:50 PDT (-0700)
Last modified: 2017-08-12 19:34:53 PDT (-0700)
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